OK I've gone back to DirectX9. No more tearing and texture ripping/wierd bleeding issues. All characters now set to 'High' with shadows turned 'Low' as their seems to be no off, as 0 = low now.

I maintain a solid 63 fps pretty much everywhere. The only place I've seen even a slight dip in frames is in Grim Batol fighting the 3rd Boss and that AoE the Dragon puts on the ground.

Stayed up till 3am last night playing, until Windows update kicked in and shut down the machine in the middle of the last boss haha.

I dont' think I'd shell out fo the ATi Card this time around - I really want to but it would have to be like a 25% performance increase really.