350w should be plenty, except the psu on the xdreamer II sucks (my rails are .5v off on the 5 and 12 v lines). But on the other hand, its gorgeous and has great cooling. You could get an antec performance series with a trupower psu, but you'd have to drill your own fan holes.

other than that, it looks good. Honestly, I think most people around here (including me) will tell you to wait on the A64s and FX-51s. For the price of one 64bit cpu, you can build most of an athlon XP system.