I am getting one of those boards soon, and looking for a CPU for it. I am thinking something like E8500 or a QX9650.

Yes, the QX is very expensive, but I found a used one for like half the price. Still expensive but is it worth it to buy a QX for this board? Or will I not be able to discover its potential? I mean the multi is unlocked, so I should have no trouble reaching like 5GHz on water, right? Or is something else holding quad back on those boards besides low multies?