Hi there, I need to upgrade the GFX card in my sons computer which has a pny verto geforce 4 ti 4200 64mb. rest of system specs are: amd athlon xp2500 (barton) soltek frnl2 agp 8x 512 mb 333 ram 350w psu he wants to play black and white 2 at high res. I'm looking at around £40 - £50 for a new card. I've seen a PNY Verto geforce Fx5500 8xAGP 128MB card and also the Sapphire Radeon 9550 128MB DDR AGPx8 which are in mt price range. Would these cards be a good replacement ? thanks.