Thanks for the input. I think I'm gonna go ahead and get it. My system has every other aspect in the high end bracket, so why not go the whole 9 yards? I think this is one of my last bottlenecks. I'm not expecting much, but ever since I read about the killer nic, I was always intrigued, and wanted to try.

Newegg has it for $129, (I almost went for their sale on the high end one for $150 but i hesitated, and they are OOS)

It's less than I spent on WotLK, so it doesn't sound too bad to me.