Ok I'll be ordering my PC tonight, but I'm still uncertain of what graphics I want 
I would ideally like a 5850 but >£210 is pushing it in my opinion, and more than I have to budget, I don't have a respectable graphics card to fall back on in the mean time (8500gt... lol), and it seems blasphemous to build an i5 PC and run such a poor card. My other option is a 5770 and get another 5770 down the line when they come down.
My question is simple really; could I get away with a 5770 for now? My monitor res is 1680x1050, and today I got Crysis and Crysis Warhead which I'd like to play on here. I want to play at 2-4x AA and with at least some AF on too as it does make a difference to me... and to make things even worse I hate tearing, so if tearing happens whatever FPS I can expect from Crysis, will it be able to handle the hit that Vsync will have? I also plan on getting S.T.A.L.K.E.R. Call of Pripyat when it's released and run the above settings.
Am I asking too much of the card and should I wait for the 5850 to drop? How long would that be do you reckon?
Argh, if only this was easier to fit into budget

I would ideally like a 5850 but >£210 is pushing it in my opinion, and more than I have to budget, I don't have a respectable graphics card to fall back on in the mean time (8500gt... lol), and it seems blasphemous to build an i5 PC and run such a poor card. My other option is a 5770 and get another 5770 down the line when they come down.
My question is simple really; could I get away with a 5770 for now? My monitor res is 1680x1050, and today I got Crysis and Crysis Warhead which I'd like to play on here. I want to play at 2-4x AA and with at least some AF on too as it does make a difference to me... and to make things even worse I hate tearing, so if tearing happens whatever FPS I can expect from Crysis, will it be able to handle the hit that Vsync will have? I also plan on getting S.T.A.L.K.E.R. Call of Pripyat when it's released and run the above settings.
Am I asking too much of the card and should I wait for the 5850 to drop? How long would that be do you reckon?
Argh, if only this was easier to fit into budget
