The GFX card isnt very good wont play lastest games well eg doom.
You should double RAM to 1024mb as would be a lot better for gaming and future apps etc.
Cant believe the standard optical drive is just a dvdrom for a £971 computer!!
Would surgest another computer manufactor as this pc seems slightly overpriced and would be good at gaming (even though seems to be aimed at such a market) as Athlon64 normally are better.