Around £100 give or take £20... SLI preferably and support for both quad and core 2 duo CPU's .. DDR2 667 Mhz has to be an option as thats what all my RAM is lol...
Just coz i might get another 8800.. i was looking at the intel ones i just need somehelp finding a decent one really.. it dosent have to SLI by any means..
If you're not going with SLI, consider the http://www.scan.co.uk/Products/ProductInfo.asp?WebProductID=591501] ASUS P5K Deluxe[/url]. My experience with it has been very positive, it overclocks really well and is very stable. It has a feature rich BIOS also, if you like having lots of settings to play with. (And who doesn't?)