2 pairs in a difficult spot. NL400.

Hey,

First post, so go easy [img]/images/graemlins/wink.gif[/img]

Button ($167)
Hero ($640.50)
BB ($488.10)
UTG (Villain) ($516.65)
MP ($535)
CO ($358.30)

Villain is 36,73/7,14 (VP$IP/PF raise) after about 100 hands. Seems pretty decent.

I have been playing rather aggressively but nothing extreme.


Preflop:/ Hero is SB with 2 [img]/images/graemlins/spade.gif[/img], A [img]/images/graemlins/club.gif[/img]. Hero posts a blind of $2.
UTG calls $4, 1 fold//, CO calls $4, 1 fold//, Hero (poster) completes, BB checks.

Flop:/ ($16) A [img]/images/graemlins/heart.gif[/img], 3 [img]/images/graemlins/diamond.gif[/img], 2 [img]/images/graemlins/diamond.gif[/img] (4 players)/
Hero bets $15/, BB folds, UTG raises to $40/, CO folds, Hero?

I feel like listening to the old saying about not going broke in an unraised pot, but then again, Villain could be fooling around with something like Adxd.

What's your prefered line and why?