Can I use this hardware setup?

[Fantersam]

I currently can spend around 300 euros, so I decided to get some new hardware for my older pc. First my PC:

Code:

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System Information
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Time of this report: 10/17/2011, 20:53:34
       Machine name: ASDASD-1B0B3FD4
   Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.101209-1647)
           Language: German (Regional Setting: German)
System Manufacturer: System manufacturer
       System Model: System Product Name
               BIOS: Phoenix - AwardBIOS v6.00PG
          Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 5600+,  MMX,  3DNow (2 CPUs), ~2.8GHz
             Memory: 3070MB RAM
          Page File: 737MB used, 4218MB available
        
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Display Devices
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        Card name: NVIDIA GeForce 8800 GT
     Manufacturer: NVIDIA
        Chip type: GeForce 8800 GT
         DAC type: Integrated RAMDAC
       Device Key: Enum\PCI\VEN_10DE&DEV_0611&SUBSYS_080110B0&REV_A2
   Display Memory: 1024.0 MB

Motherboard : Asus M2N-E SLI nForce 500

mainboard

RAM

CPU

I hope this setup is okay so far.

Could you give me suggestions for a graphic card? I'll mostly play emulators so it doesn't has to be the best.
somewhere around 50- max 100 € would be great.
Thanks for any help (: