Maximum PC

My budget is around £1500, but i'm up for spending less!

All i know is i would like a GeForce GTX 680 (i believe i can get one of those for around £400) and a 250GB SSD (£140), Should be able to support 3 monitors and 3D gaming

(monitors are not included in my budget)

what i need help with: Motherboard / CPU / Memory / Correct size case / Power supply / Cooling system / Anything else i don't know about

I'm asking this because this is my first time planning a build and i have no idea if i have to get special items for 3D/3 monitors and what stuff is compatible with each other and the right size to fit.

Please help!