http://www.overclockers.co.uk/acatalog/9700_to_9800_Series.html
Which card on that page is the best? need advice 
Sapphire ATI Radeon X700 Pro 256MB GDDR3 TV-Out/DVI (AGP), (the last one). You want to get a pro version (higher clockspeeds) with 256Mb of GDDR3 vram just like the one at the bottom. Though if you can find one a X800GT would be even better (even the 128MB version).
Are you sure you don’t want an AGP 6600GT instead of an X700? They perform better.
Well if you can find one on that site that is within the price range of £105 and will perform the best by all means link me to it 
Theres a 6600GT here, its AGP but has 128MB VRAM. Its more expensive than the newer PCI-E ones however. http://www.microdirect.co.uk/ProductInfo.aspx?ProductID=8369&GroupID=0
Otherwise try searching 6600 AGP on there.
If you must buy strictly from that site and cards on that page, then the 256MB Radeon X700 Pro is your best bet. Otherwise, I’d look at some other UK sites and see what you can find for a GeForce 6600GT.
Yeah I was considering an X700Pro and then in the end I chose an XFX 6600GT 128MB AGP8x, apart from the loud cooler (now replaced) it’s great, got a pretty good overclock out of it as well (from 500/1000 to 600/1200)
Anyone know any other UK site’s that are relible and have good cheap prices?
www.eclipsecomputers.com
www.rlsupplies.co.uk
www.savastore.com
www.microdirect.co.uk
Those are just a few.