should i bet? and if so how much

[Aschweinsteiger]

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP1 (t2710)
MP2 :#A500AF(villian)/ (t2385)
MP3 (t6375)
CO (t1800)
Hero (t2835)
SB (t3010)
BB (t2760)
UTG (t3295)
UTG+1 (t3550)

Preflop: Hero is Button with T[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img].
<font color="#666666">3 folds</font>, MP2 :#A500AF(villian)/ calls t100, MP3 calls t100, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t500</font>, <font color="#666666">2 folds</font>, MP2 :#A500AF(villian)/ calls t400, MP3 folds.

Flop: (t1250) J[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

villain checks to me. I'm in position, do i check or bet and if you say bet how much?