What forester said.

I have a similar build, only mine's on a Gigabyte 890XA-UD3 motherboard, with an Nvidia 240 video card as a placeholder until I decide exactly what card I want there. I also run a E-MU 1616m audio card and breakout box on my CG box, as it also does video editing and post effects.

Vue is stable and fast.

Premiere Pro CS4 also steady, and quick with the hex core to draw on.

Modo rocks.

Messiah ditto.

Poserpro 2010 likewise (and that is with a 56gig external runtime feeding through the last iteration of Hogwarden's P Booost program).

Audition 3 practically inhales input.

Haven't tried out Encore yet, but it should have more than enough resources to play with.