guys thanks for all your help and advice, the thing is, equipment is so expensive here in south africa! the i5 750 is around R1650 (+/- $226), but all in all, i'll have to upgrade!!
i'll save up a bit more and buy the i7 chip, before i buy a new gfx card, my card is still running perfectly, and i'm running everything on high settings at 1680 x 1050, (22")
thanks guys, much appreciated!!