I see no technical reason that a I7 wont do 10, I do 6 every day on a way way worse computer (well 3.2g clock rate helps) with 3.5G usable ram.

I'm always full screen not tiled so for my playstyle (fliping a lot) video card would not be a problem. I think that you would want a video card with 1G or more ram.

Was a thread where some said that you cant get 24G to run reliably on most I7 motherboards yet, even though they are speced for 24G. At 24G you can put the whole wow folder in ram and that is going to allow you unreal framerates.