imo,
save some £££ in some places like cpu and go for a watercooled overclocked e8500 solution,
as for the gfx , an awkward time to decide to buy a gx2 , all that cash, i know it will be hard, but just hold out for the gtx 260/280, will open up options and probally alter prices of previous gen cards.
I would personally wait for a gtx 280 , i've read all the reviews of them and i am pretty much in awe of them especially the HD encoding speeds. you could with that budget prehaps sli 2 gtx 280's and that would be a killer gaming rig. hense why you should save money on the cpu's to spend more on gpus, overclocked 8500's still own.
hope this helps a little
2 GTX280's in SLi would cost about a grand and you would need a £150 power supply to power the thing. Utterly pointless, as is the E8500 which is a fair few bob more than the E8400 and all you get is a few extra MHz