ok, you are right, I could save a couple of bucks if I get the Antec Basiq vp450 for 40 ($30 after mail in rebate).
that should work fine, and should take up to a 6850/7850 AMD video card, or up to 550ti/560SE from NVidea (maybe the 660?)
My system is complete and I couldn't be happier with the experience. The only thing I would have done differently is install Linux only instead of dual Windows/linux. I never use Windows now that I have Ubuntu installed.