Top pair vs PF raiser

[Griffin]

Here is a situation that I'm not sure how to handle, but it comes up often enough that I need some advice. I'll give a specific hand I played as an example, but the general issue is how do you handle a preflop raiser when you act before him and you flop top pair on a uncoordinated board; more specifically, when it is unlikely that the flop hit him?

Example...

Table is 2/4 loose/passive with a couple of good players.

I'm in MP with T[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/heart.gif[/img]
EP1 limps, EP2 limps, I limp, button, who is one of the good players, raises. I and the two other limpers call his raise.

Flop T[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/club.gif[/img]

Checked to me, I bet, button raises, EP1 folds, EP2 cold-calls, I call.
Should I bet out? Check-raise? Should I call a raise, fold, or re-raise?

Turn 2[img]/images/graemlins/club.gif[/img]

Check to me, I bet, button raises, EP2 folds, I call.
In this case, I didn't want to give the button credit for a higher PP as he could easily have raised with AK, AQ, KQ, etc. But if I believe that, shouldn't I be 3-bettting here?

River J[img]/images/graemlins/heart.gif[/img]

I check, button bets, I call. I'll give results in another post.

I usually go into check/call mode after being raised on the flop, but I've been shown a higher PP often enough that I have started wondering whether I shouldn't be folding on the flop or turn. What I worry about with that choice is that I'm losing pots to anyone who plays overcards like AK, AQ, KQ aggressively. While it is possible that the button had AA-TT, other hands, which I beat, are also possible.

When do you give the PF raiser credit for a higher PP? Which has the higher +EV in the long run, folding (at what point?) or calling it down?

Obviously, I'm clueless about how to handle this, so thanks for the advice!