Stars $6.5, BB with T5o, QT flop

[Uniqueuponhim]

Villain is a donkey that almost always completes the SB, and has generally shown down very weak hands. I've been pushing over him each time he completes, so by now his calling range is wide enough to make a preflop push -EV here. The guy has minbet-folded on flops before. This is also the first flop I've seen the entire game so I have no image at all for postflop play (not that villain would be likely to be paying attention to that).

So is this push over his minbet on the flop a good idea, or should I fold because of the shortstack and the possibility of better spots later on?

PokerStars Tournament, Big Blind is t200 with t25 antes (4 handed) Converter on pregopoker.com

CO (t6270)
Button (t1425)
SB (t3225)
Hero (t2580)

Preflop: Hero is in BB with 5[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/spade.gif[/img]
<font color="gray">CO folds</font>, <font color="gray">Button folds</font>, SB calls t100, Hero checks

Flop: (t500) T[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/heart.gif[/img] (2 players)
<font color="red">SB bets t200</font>, <font color="red">Hero raises to t2355 (All-in)</font>