What PSU should I get for this customized Dell PC?

I'm planning to order it with an nVidia GeForce 9800GT video card, 3GB DDR2 RAM, 640GB hard drive and a Sound Blaster® X-Fi Xtreme Music PCI Soundcard.

Should be real nice.

But since the package is coming with a 350 Watt DC Power Supply, Backup battery: 3-V CR2032 lithium coin cell, I not sure if that is good enough for the customized system in question.

id use a 500 watt and run from there

like this antec psu

or this zalman psu

other than that and as said before i use a 500 w

also u might wanna specify which one your getting

and such