Best video card?

Hello,
What's the best video card that I could support on
Operating System: Windows XP Home Edition (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.100216-1514)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 09/11/08 11:13:41 Ver: 08.00.12
Processor: Intel(R) Core(TM)2 Duo CPU E7300 @ 2.66GHz (2 CPUs)
Memory: 2048MB RAM
Page File: 553MB used, 3386MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.5512 32bit Unicode