CPU The Intel 7700K is still one of the best in single core performance with a high core clock, you can reach 5 Ghz easy. Even though it is not the most budget friendly processors out there, its new brother the 7740X is not far ahead, despite lower voltage to reach 5 Ghz. If your looking for the best gaming processor on the LGA 1151 - Z270 - Z170 platform, this is the one.
CPU cooler To cool this beast at 5 Ghz+, the Corsair H100i is becoming a standard in processor cooling within the AIO market. With copper cold plate, rigid tubing, and 240mm radiator this coolers keeps a delid 7700k clocked to 5 Ghz comfortable, even when the CPU has not been delid. Average temps while gaming, or benching is 65 C - 77 C, highest I have seen was 81 C. Before Delid, average was 72 C - 80 C, high of 98C.
Motherboard Asrock Z270 Taichi, to me Asrock has been the go to board, for almost Asus level of quality and performance at a cheaper price. The bios can be hard to get use too, but once you do the board is a monster at overclocking. This boards comes with all the bells and whistles from Dual lan, built in wifi, triple M.2, up to 4000+ Mhz memory support and decent VRMS. Though lacking in RGB intergration with the only light coming from chipset, you can control RGB strips through the built in header.
Memory G.skill has been the leading "Go To" vendor if you want Rainbow RGB or to control of specific RGB zones, not to mention the Speed offerings they have are great. I went with the 3200 TridentZ, to match aesthetics and to get the middle ground of maximum performance. Right now G.skill is still working to improve the software they use to control these RGBeast, but to me it is worth the hassle when the system look and runs beautifully.
Graphics The (Gigabyte) Aorus 1080 Ti, is not the top of its family but with a little of manual tuning you can get this base edition card to reach level achieved by its bigger brother. Your results may vary but I was able to get the Core clock to 2050 MHz, and Memory clock to 11850 Mhz. As the 10 series graphic cards are near their thermal / voltage, unless you spend bigger money on the EVGA K|NGP|N, most of these cards are around the same within Margin of error. The Aorus 1080 Ti runs great, and stays cool, the RGB gives the case a wonderful colorful touch along with other RGB devices, and works with them too. You can customize your cards RGB flavors with the Aorus Graphics Engine.
Storage 960 Evo M.2, depending on storage size, can be well within budget. However because of Nand and DRAM shortages the best time to have grab these components was at the end of 2016, beginning of 2017. Prices are steep now, but I got mine prior to shortage, still you can get the 250 Gb for around $125. I am running my Evo's in Raid 0 at the moment, but strictly for benchmarks because there is not real world benefit and you double the chances of losing your data. Just make sure to image your system or primary drive with OS. The 960 Evo is fast, may not be the fastest out there today, but fast enough and will write 100 Terabytes before its time to upgrade. 3200 Mbps Write, and 1500 Mbps Read, but make sure you have decent air flow to avoid thermal throttling of drives, (Operating Temperature 0°C ~ +70°C)
850 Evo 2.5" SSD, tried and true drive that is a staple in the upgrade path, this drive is great for anything that can fit a 2.5" hard drive, from small laptops to big work stations. This drive is not has fast as Nvme drives but in real world performance you won't be able to tell the difference between Nvme and 850 Evo. 520 Mbps Write, 540 Mbps Read, (Operating Temperature 0°C ~ +70°C)
4 TB Western Digital Blue is great for storing your RAW video files, after you have encoded or decoded on your main drive. As it is a platter hard drive don't expect SSD level of performance, but it can hold a lot more Obviously.. At 5400 RPM this hybrid drive has decent write and read speeds, and is great for storing all of you data.
Power Supply Corsair HX750 is a semi modular PSU, that is capable of powering your entire system within comfortable limits. The PSU is older then the newer designs so the fan does not cut off when there is a low load, but the fan speed with ramp up and down on its own keeping temps in check. This power supply is great for any system, but beware if you go with Dual graphics you may need to venture into the 850w or above to power your monster.
Home The case these components call home is the Thermaltake Urban S31, not the best case out there but great air flow and room for radiator support. You have two hard drive cages up front, with the top one being removable, allowing for long graphics card 300mm+. The bottom cage is riveted but with a hole punch and hammer you can remove it and mount with your own solution or just leave it off, and mount a 240mm radiator up front, and one up top. Plenty of room for motherboards of all sizes, with a CPU mount cut out on the back for ease of cooler installation. Clean brush aluminum/plastic front door, with a decent side window, grommet cut outs, and dust filters in the Front, Top and Bottom. The feature that attracted me to this case at the time purchased, was the top of the case has a HDD bay for fitting 3.5" and 2.5" drives, which work for ease of computer / laptop repairs. Hot swap capable so I can help others scan, clean or format drives quickly.
Intel 7700k OC 5.2 Ghz bought from Amazon Corsair h100i V2 bestbuy (in a pinch, old one needed replacement) Z270 Taichi bought from Newegg G.skill TridentZ RGB 3200 Newegg Aorus 1080 Ti preorder Newegg 500 Gb Samsung 850 and 960 Evo 960 Evo Raid 0 Newegg Western Digital 4 TB Amazon Corsair HX750 NCIX Thermaltake Urban S31 TigerDirect (it can hold more than it states) Mixture of fans collected over time, and monitors until I can upgrade.
Runs strong, overclocks well, should last the next 5 years no problem.