I decided to stick to a tried and tested chipset/cpu combo that wouldn't break the bank so I chose a Gigabyte P35 DS3R mobo with an Intel Core2Duo E7400 and 4 gigs of RAM.
The videocard is a Sapphire Radeon 4670 with heatpipe cooling so no more fan noise!
Everything seems to be working ok. And it's really quiet now which I love. I think the 4 gigs of RAM really make the most difference in general responsiveness as I only had 1 gig in the old PC.
Haven't really stresstested it yet (waiting for Scope 5 keys
