AJ on the button

[Ms 45]

You're on the button with AJ, and there are 3 limpers ahead of you (all 3 play a little too loose). Both blinds are loose and at least one of them is apt to play if you raise. Do you call or raise? Why?

In HEPFAP, the advice is to call in a situation like this and keep the pot small. It seems to me, however, that a raise is a better play because you get more money in with the best hand, and if the flop is an airball you can usually get a free card when they check to the raiser.

Comments?