PSU for a 3200+ with 6800 gt/ultra?

Im not sure what kind of powersupply im going to need in order to have a stable system. Ive heard the geforce 6800 cards are real power hogs and im going to have to upgrade my psu.
Heres my system spec:
3200+ athlon xp
abit-an7
2HDDS
1Floppy
1cdrw
6800 gt or ultra.

Im thinking of getting an enermax 470W supply, will this do the trick or will i need more power? Also if anyone can reccomend cheaper/quieter psus that are up to the job then thatd be great
Thanks

Split

Actually, the 6800 isn't as bad as you think. MaximumPC connected a number of PSUs - PCPowerandCooling 410 and 510, respectively, Sparke Power 400, SFF 250, generic 400 - and found that the last two crapped out. All else were unaffected and ran just fine. See, Nvidia recommends a minimum of 480 Watts of power. After said comparison, MaximumPC believes they meant a generic 480W PSU.

I'd go with the Fortron Source or Sparkle Power 400W, which are better power supplies than the Antec 430W (higher output, longer MTBF) and cost less.

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