Get a Corsair, Forton, or Enermax. May have missed some but those offer good quality power supplies for a great bang for the buck. Make to spend at least $80 on a good quality power supply!
I spent $80 on my power supply and its only 400 watts but powering all of this just fine. Even thinking of getting a GTX or Ultra in the future maybe or the next generation nvidia video card. It should run one fine even on this power supply. Though I doubt SLI but I have no use for two video cards because my motherboard doesn't support it so I would need to buy a whole new motherboard and I don't think I am going to do that anytime soon.
Intel Duo 6420
4 gig of ram
WD Raptor 150 gig 10,000 rpm hard drive
Hitachi 500 gig 7200 rpm ide hard drive
200 gig Maxtor 7200 rpm ide hard drive
Geforce 8800 GTS
pci tv tuner card
Four 80mm case fans
dvd-burner
Enermax 400 watt Liberty power supply
JavaMomma offered this great link in a thread that is a recent review of the Fortron Zen 400 watt power supply. Its a very high quality but expensive 400 watt power supply. Though you get what you pay for. It ran amazingly Core 2 Duo E6600 and two Geforce 8800 GTS in SLI just fine. When they overclocked the CPU to 3.2Ghz with more vcore and also both Geforce 8800 GTS cards at 600 (GPU) 1000 (MEM) in SLI it still ran fine even though total power draw was now 400 watts but still it ran fine! Which is incredible! I wouldn't even think a system like that even not overclocked would boot up on even a very high quality 400 watt power supply but it did. Te thing that amazes me most is that it uses SLI and still works fine. I bet if you didn't overclock the cpu or at least not the video cards but only the cpu you could easily run a SLI GTX or Ultra video card setup on it as well. Now there is no way i expect my Enermax 400 watt to be able to do this because I only paid $80 and it doesn't have quite as much power as this one but the Fortron Zen 400 watt power supply is almost twice as much. I really don't need it because I am never going to do SLI. To much trouble.
http://www.madshrimps.be/?acti...tpage=2537&articID=574