You may want to invest your money in a better monitor. I couldn't imagine spending the extra money on a 965 to skimp on everything else. Get the 5850 and spend money on a monitor with at least 1680x1050 (preferably 1920x1080). You can get a good 1080p monitor for around $160.
Performance wise... GTX 260 SLi > HD 5770 CrossFire > HD 5850
Cost wise... HD 5850 < HD 5770 CrossFire < GTX 260 SLi
With single cards:
Performance wise... HD 5850 > GTX 260 > HD 5770
Cost wise... HD 5770 < GTX 260 < HD 5850
Obviously you're getting what you pay for. It's important to note the HD 5850 and HD 5770 CrossFire support DirectX 11 and will use less power/output less heat. If you're sticking with that monitor, CrossFire/SLi is overkill at that resolution.
see my main thing is, is to fullfill my thirst for games. namely the top titles from 2007 till present.
now from what i have gatherd from toms hardware
i can do this on full graphics on a 20 inch
and for an xtra 200 uk pounds (about 350 dollar us) i can do it on a 22 inch (1900 x 1080)
as Gamers do you guys think i should spend the extra 200 ?
serious answers please , this is going to help me in my decision ........ i realy dont want to spend the extra money if i dont have too.
One HD 5770 or GTX 260 is enough for your current resolution. You can buy a new monitor with a higher resolution if you feel you need it -- I was just suggesting it in the case you wanted to go CrossFire or get an HD 5850. If you feel your current resolution is enough you should just stick with it and get the cheaper cards until you want to get a new one.