So say i bought the card + quad, would it fit in my current build my current mobo?
I don't know what your current mobo is

And what card would you suggest?
That's a toughie.
Its a breakdown between a GTX460 1GB or a HD6850 1GB.
Stulid has recently informed me they are of similar prices, although the better versions of GTX460's will cost you slightly more.
http://www.hardwareheaven.com/revie...color-radeon-hd-6850-review-introduction.html
I'd read that through - but keep in mind that the GTX460 used is overclocked and £15 more expensive that the card its being used against.