I would love to game with 2 monitors but i only have £150 for the graphics card left over; My motherboard - Gigabyte GA-MA790XT-UD4P this has 2 graphics card x16 slots (dual x8) I was thinking maybe 2 HD4850 (512MB) or the HD5830 when it comes out. I want to play MW2 and GRID etc. it doesn't really matter about AA or AF but I do want it to look good, so what do you think?
Also I will try to overclock a bit but I have never done it so it might be a sucess
I would get a single powerful card over two lower powered ones, a single card is good enough to display two screens. For £150 a 5770 would be good, a 5830 might be a bit more than that, but I'm not to familiar with £.
If your not going to build until July, Id say come back maybe 3-4 weeks before you are going to build and ask this question again. A lot of things might happen in 4-5 months, maybe by then the 5850 will start creeping into your price range. Plus we have Nvidia's Fermi GPUs that are supposed to come out some time between then and now.