Help me choose mobo, RAM, CPU and Vid

[muppet]

need help choosing best available choices and I know you guys know your stuff..

mobo - SLI / Crossfire compatible, latest features, stable (DFI NF4 SLI-DR Expert?)
RAM - 2GB, quick - (OCZ PC4000 EB PE?)
CPU - not sure, best price/performance, definitely AMD 64bit Dual Core
Video Card - NVIDIA or ATI, dont mind, has to be SLI or Crossfire compatible, suppose it depends on mobo - price not above £300 each

What do you guys recommend?

Thanks

 

[Finns14]

Can you put that in USD as well cause Im not sure how much that is

 

[muppet]

£300 = 517dollars