Thanks for the responses guys!
I'll be mainly using the machine for gaming and a bit of music recording, but I've only bought the mo'bo and CPU so far. I guess I could put off buying the 2nd Samsung F1 drive that I was considering...
Are the 4870's really that much better then?
I've heard some horror stories about cooling on the 4850's, hopefully the 4870 will be somewhat better in that respect.
Is there much difference between manufacturers - i.e Powercolor and Sapphire? or are they all identical components/specs?