4/180 - Top pair, medium kicker w/ akward stack

[MNoller]

About 30 people left, been at this table for a while. MP1 had been limping a lot, but no one had punished him for it yet. CO's been calling raises constantly, so I don't think he has to have much here. Button hasn't been at the table very long.

In retrospect, I don't think I like my pre-flop raise size that much. At the time, I was thinking that it would give me good FE and produce an okay-sized pot provided not too many people called. So of course, enough people called to only leave me a pot-sized bet left. What's my best line here?

PokerStars No-Limit Hold'em Tourney, Big Blind is t400 (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero (t10868)
CO (t16555)
Button (t18725)
SB (t3390)
BB (t11454)
UTG (t3230)
UTG+1 (t8845)
MP1 (t23923)

Preflop: Hero is MP2 with T, A.
2 folds, MP1 calls t400, Hero raises to t2000, CO calls t2000, Button calls t2000, 2 folds, MP1 calls t1600.

Flop: (t8175) A, 5, 8 (4 players)</font>
MP1 checks, Hero ?