|"I don't play fps'"|
Who doesn't play shooter games??
"Will probably use a tigerdirect.com barebone kit"
I would avoid TigerD. And if you're capable of building your own system, I suggest you buy the parts individually rather than a kit. I can recommend the main components to build off of...the rest is up to you:
CPU - X2 7750 Kuma - $59
ASRock AM2+/AM3 AMD 780G/SB710 motherboard - $70
CORSAIR 4GB (2 x 2GB) DDR2-1066 - $34 after rebate
CORSAIR 400W ATX12V 80 PLUS Certified PSU - $40 after rebate
You have a few choices for the graphics. The 780G motherboard has the best integrated graphics currently available so it *may* be all you need. If you feel you need a little more power, you can either install a discrete Radeon HD3450 & team it up in with the onboard graphics using "hybrid crossfire" mode, or you can get an even better discrete card, in which case I recommend a Radeon HD4670. Here are two possibilities:
ASUS Radeon HD 3450 256MB 64-bit GDDR2 - $24 after rebate
MSI Radeon HD 4670 512MB 128-bit GDDR3 - $53 after rebate
Depending on which video card route you take, the above will cost you $203 for just the base unit with no video card, $227 for the Hybrid Crossfire setup, or $256 for the discrete video card setup. Plus applicable shipping, of course.
The choice of the case, optical drive(s), HDD(s), floppy (yes, I recommend a floppy drive), monitor, speakers, etc would be up to you, but I see no reason why you couldn't build the entire system for under $600.