guys i would like to upgrade my video card but im computer stupid and have no clue what to get. below is my current system...any comments are more than welcome

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System Information
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Time of this report: 4/13/2009, 23:23:52
Machine name: BART
Operating System: Windows XP Home Edition (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.080814-1236)
Language: English (Regional Setting: English)
System Manufacturer: ELITEGROUP COMPUTER SYSTEM CO.,LTD.
System Model: NFORCE6M-A
BIOS: )Phoenix - Award WorkstationBIOS v6.00PG
Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 4600+, MMX, 3DNow (2 CPUs), ~2.4GHz
Memory: 2046MB RAM
Page File: 518MB used, 5874MB 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
Card name: NVIDIA GeForce 7300 GS
Manufacturer: NVIDIA
Chip type: GeForce 7300 GS
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_01DF&SUBSYS_C4363842&REV_A1
Display Memory: 512.0 MB
Current Mode: 1024 x 768 (32 bit) (75Hz)
Monitor: Plug and Play Monitor
Monitor Max Res: 1600,1200