Help me buy/find a new video card

As it relates to World of Warcraft...

Low FPS in 25-mans (under 10 FPS) finally got to me, and messed me up pretty badly on our first 25-man Malygos attempt, leading me to turn all my settings down for the rest of the fight. So, it's time for a new video card.

It has to be purchased through Newegg, since I have an old gift certificate for there.

Here is my system, which for the most part was built January 2008. I'm not familiar with what is and isn't compatible with my current hardware, but hopefully someone here is.

Thanks!


VIDEO CARD:
GeForce 7300 GT - 450 MHz, 128-bit, 256 MB memory, PCI Express x16

MEMORY/RAM: (two of the following, i.e. 4 gigs)
CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model TWIN2X2048-6400C4

MONITOR:
LG W2452T-TF Black 24" 2ms(GTG) Widescreen LCD Monitor

MOTHERBOARD:
ASUS CROSSHAIR AM2 NVIDIA nForce 590 SLI MCP ATX AMD Motherboard

CPU/PROCESSOR:
AMD Athlon 64 X2 6400+ Windsor 3.2GHz Socket AM2 125W Dual-Core Processor Model ADX6400CZBOX

OTHER:
very old case (2001)
430w Antec power supply (came with the case) (2001)
35 gig hard drive (2004)


And no making fun of my hard drive.