Until I go to college, the plan is to set the thing on the floor. But once I'm in the dorm, I don't know where it will end up as of yet. I don't need it to be silent, but quiet would be nice. I forsee that my video card will play a major part of the noise factor, as the stock fan is quite loud. I would like it to be at least mildly pleasing. It doesn't have to be "OMG THATS SO SECKSI!!11" but I don't want it to look like the rear end of a cow either.
I consider SFF to be anything mATX or smaller.
I plan on carrying over at least 1 ODD (my DVD+/-RW burner), 1 HDD and probably a floppy drive, or if I can find one cheap enough, a floppy+card reader combo. I will also carry over my 7800GT. If I could find a good board with DDR1+2 support that would be awesome because then I could carry over my 1 GB stick of DDR400; but I do not see this as likely.
My only gripe with Shuttles is that I wouldn't be able to re-use the case and just plop down a new motherboard because they use proprietary stuff.
edit: I might end up selling my old motherboard, CPU, and RAM (probably for something like $150 or less) if my parents don't want it. That might give me some extra cash for the build, but dunno if it'll be something I'll try and set up before hand so I'll have the extra cash at buying time or later. :-/
Gigabyte Z77-DS3H | Core i7 3770 | 2x8 GB Crucial Ballistix DDR3-1600| Samsung 830 128GB SSD | Gigabyte HD7950 3GB | Win 7 Pro x86-64