I use SeaSonic PSUs (never had one fail in the last 6 years I've been using 'em; can't say that for coolermaster, antec or OCZ PSUs that have all had at least one failure) which are pretty cheap compared to name brand rebranded crap.

As for cases, the two I've used for the last 3 PCs have been very nice. If you want something very quiet, the Antec Solo Quiet Case has been great at my Mother's place. They run about 70-100 bucks depending on sale days. http://www.endpcnoise.com/cgi-bin/e/...ntec_solo.html

The last two I built here at the house haven't been as quiet but they are 90% tool-free installs and are only about $49. I like 'em a lot. CoolerMaster Centurion 5. http://www.newegg.com/Product/Produc...82E16811119068

If you go with a regular case, ignore whether they have fans. The shitty fans that come in any of the stock cases (even the "uber" cases) all suck balls, are loud and usually have crappy bearings or even plastic/teflon shims. Just grab a Scythe S-Flex 120mm fan to put in there, plug it into the mobo's 3-pin header (assuming yours has those) and call it a day.

Again, not the rock-bottom cheapest solution but it's not enough extra to quibble over, IMO. You pay a little bit more and get a LOT better quality.