need help choosing a psu

[pingwin]

hi all

i'm toying with the idea of building a gaming/fileserver rig, something along these lines:

AMD Phenom X4 9950 Black edition,
MB Gigabyte MA790GP-DS4H, Socket AM2, AMD 790GX,
DDR2 4Gb (2x2Gb) PC8500 Corsair, 1066MHz, TWIN2X4096-8500C5D,
Thermaltake VH6000BWS big tower Armor+
HDD SEAGATE Barracuda 1 TB,
HDD SEAGATE Barracuda 1 TB,
Noctua NH-U12P
Sapphire VGA ATI HD4870 X2
Sapphire VGA ATI HD4870 X2
Lite-On DH-20A4H, DVD±RW
Lite-On DH-20A4H, DVD±RW
7x Noctua NF-P12 120mm fan

with probably 2 more HDs to join

the big question is will an Antec SG-850 be sufficient for a nice stable run? or do i go for something bigger? perhaps an HX1000??

[Smirnoff]

With a Phenom and HD4870X2s in CF you should probably aim for at least a 1kW unit. To have sufficient headroom. Those cards are really quite the power hogs.