Calling a steal all-in with AJs

[TylerD]

Should I? $27NLHE turbo on Stars. Blinds are going up in 1 minute to 200/400 ante 25. The SB has once called to me in BB and I took it down post flop, next time it was folded to him he went all-in (i mucked 84o). I don't think he'd do it with complete trash, so there's a decent possibilty he'd have Ax (but not better than AJ) and a fair chance he'd have a pocket pair (but not better than JJ).

So the question is should I call here with possibly a dominating hand or possibly a 50/50 shot and give myself a good shot at winning, and a 95% chance of moneying or should I fold, steal some antes and wait to be the aggressor?

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (5 handed) converter

SB (t1830)
Hero (t2455)
UTG (t745)
MP (t4395)
Button (t4075)

Preflop: Hero is BB with J[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
UTG folds, MP folds, Button folds, SB raises to t1830, Hero