by the way would you reccomend the setup im going for?
It would help if you would show your entire setup, sir, for that question.
DO not SLI! It is not worth it with it unless you want to game on 3 monitors. Plan to game with 1 GPU. 2 GPUs causes microstuttering which is annoying when gaming. You're better off with 1 GPU. If you need to upgrade then sell your old one and get a new one.
8320 is great. Overclock it with a Cooler Master Evo. What's your mobo?
Ah ok, ill keep that in mind when upgrading, would you still reccomend the 650ti boost for someone on a tight budget.
i don't have any components yet. armed with approximately £400 my goal is to build the best value gaming PC i can
The 650 ti boost is the best choice for $130 or aroundish.
For a "budget" build the 650ti Boost is awesome. Very good GPU for the price. I highly highly recommend it.