Live $80, isolate or bail?

[q16]

Live $80 MTT that only got 10 entrants + alternate, so I guess it's really a STT question.

This is only the fourth hand, but BB has already donked off most of his stack with very weak holdings.

BB: 575
EP: ~2000
Hero (MP3): 2000 A [img]/images/graemlins/heart.gif[/img] J [img]/images/graemlins/heart.gif[/img]
Button: ~2000

EP limps, Hero raises to 250, Button calls, BB shoves, EP folds, Hero ?

I'd hate to go out so early with a hand as crap as AJs, but a shove should get Button off of his most likely holdings, except maybe AK or rarely a very clever and trappy AA/KK, right? Folding to the BB seems insane. Calling puts me out of position for a huge pot in the best scenario.

(Also, in retrospect the PFR looks a little big/weak. Anyone raise to 175-225? Limp along?)

Edit: Blinds 25/50; sorry, 2p2 noob.