Client needed to upgrade an aging Dell office machine running XP, so this is simply a budget office machine. I didn't want to deal with any rebates this time around, so that's why some of the prices aren't crazy steals.
CPU: Thought about going with an APU, but I had an old 550 Ti sitting around, so I went with the X4 740 to keep it cheap and didn't want less than 4 cores on the AMD side...of course the day after I bought it an A8 series was the Shell Shocker with quite a bit higher clock. Oh well. (Amazon)
CPU Cooler: Probably the item I could've cut for the budget, but I really hate noisy stock coolers, so I went with the T2, since it was pretty cheap. Super easy install (one of the things I like about AMD builds). (Amazon)
Motherboard: Basically the least expensive FM2 board available that doesn't have butt-awful reviews. I like all the SATA3 ports, nice to have options. (Newegg)
Memory: I waffled between 4GB and 8GB, but went with the 2x4GB because I really don't think the user will utilize 8GB anytime soon, and it was, obviously, less expensive this way. GSkill is good stuff, and wanted to go low profile in case the T2 had clearance issues (it ended up not being that big). Speed isn't an issue in this scenario, so 1333 is fine. (Newegg)
Storage: Cheap, reliable, loads of space. (Amazon)
Case: Settled on the Challenger because a) it's decently built for the price, b) cable management options and c) I don't have to buy any extra intake fans, which saves a few bucks. No USB 3.0 is not a problem. (Amazon)
PSU: I usually stick with Corsair CX units for budget builds, but got this EVGA on decent sale, and it has better reviews at a higher standard deviation than the CX430/500. It's not a gaming/editing rig, so it won't be stressed at all, so I think it will work out just fine. (Amazon)
Graphics Card: Obviously, it's overkill, but it's been sitting around without a home for a few months, so it need a PCI slot to call home. (Recycled part)
OS: Got a Dell branded OEM Win 7 Pro download for cheap; best OS for current network infrastructure. (DiscountMountain)
Other thoughts: For putting a micro-atx into a mid size case, cables turned out really well in this case (ba dum ch). I was able to run a lot of stuff up through the mobo cut-out and under the motherboard (4-pin, fans, etc); really helped keep it clean. I appreciate the PSU intake fan filter on the case and the decent cable management options, though would've been nice to see more at options at the top. Overall, it was a fun build to layout and work at keeping clean.
Cheers & thanks for looking!