[phixxx]

It depends on the stack sizes. If the stacks are very deep, what I've heard around here is that caling a raise for 10% of your stack is a good idea. The implied odds that you'll get from playing those pairs is very high in a deep stack game. However, if the stacks are much shorter, I believe it comes either raise or fold, and if the stacks are VERY short, push or fold.

I'm tired and could think of more, but I'm going to sleep.