The temps always go up during the summer. I've never not had that happen to me. In fact, I've already turned down my OC once this year, and it seems I'm gonna have to do it again.
But, dave if your spending the money for a new HSF, there are better then the Arctic Freezer, that's just the best for the price range. If you want the best air cooling possible, go with a Thermalright Ultra 120 Extreme, or a Tuniq Tower. Those are generally rated the best air coolers out.