Dude, you could spend £1500 and have an awesome PC if you build it yourself.
Don't bother with AMD, i had a 9850 Phenom, they are crap compared to Intel, i now have a Q6600 much better.
Others on here have, both AMD and Intel Rigs, and a lower spec Intel beats the AMD.
If you want i can propose a build for you.
Oh one other thing i wouldn't bother with the GTX280 its wayyyyy exspensive for what it is, lots of probs with heat. As you have loads of cash get 2 x 9800GTX+ in SLI then add a third card later for tri sli when the drivers improve.
Nothing scales higher at the moment.
Edit: Khane, you might wanna start a new thread as we have kind of hijacked this, just call it new build or something.