Folding aces, preflop, in a cash game

[RoundTower]

I was sure this question would have been done to death, but I couldn't find anything on it. I saw a similar situation to this several days ago.

In a no-limit hold'em cash game, you have A [img]/images/graemlins/spade.gif[/img] A [img]/images/graemlins/club.gif[/img] in the big blind. One or more players go all in before you, and the rest fold. Before you can call, the all in players all flip over their cards.

You are concerned only about maximizing your EV from this hand. In what circumstances should you fold here?