Hey all, I'm planning to build a system that will be solely running 10.5.6 (It has to be 10.5.6 as the friend I'm building this for says its a requirement (he plans to use it for logic and music making n stuff) and it effectively has to be a worthy substitute for a Mac Pro.

I'm looking at shoving in two nVidia 8800GT cards, a Core i7 920, 6GB of 1600MHz RAM and a 1kW power supply.

I'm trying to choose a motherboard with a high level of compatibility so that the end user will have less problems and therefore I will have less problems!

So yeah, which one do you guys recommend?