TPTK, best line?

[RobA]

10-20 in AC. 10 handed for this hand. Game is a little tight right now, maybe 3-4 to flop on average, not much post flop action.

I get A [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/club.gif[/img] in MP. EP limps (seen him limp J8o from MP; limping too many hands to be very good). I raise. New player to my immediate left (MP2) (20'sish white kid) 3-bets (its like his 3rd hand). SB folds. BB calls (loose-passive, definite donator). EP calls. I call. 4 to flop for 12.5 SB.

Flop Q [img]/images/graemlins/diamond.gif[/img] 6 [img]/images/graemlins/heart.gif[/img] 3 [img]/images/graemlins/spade.gif[/img]. BB checks. EP checks.

What is my best line here and what should I do, given various responses by MP2 and the rest of the table, for the rest of the hand?

Thank you for your comments.