Stars 10+1 rebuy final table hand

A hand from the final table of the stars rebuy tournament 5 handed. Blinds are 40000/80000 with a 4000 chip ante.

UTG: (t914212)
CO: (t1508613) (Hero)
Button: (t4553061)
SB: (t1324710) (Villain)
BB: (813904)

Hero in CO with A [img]/images/graemlins/heart.gif[/img],K [img]/images/graemlins/heart.gif[/img]
UTG folds
Hero raises 3x bb or t240000
Button folds
SB raises 240000 to t480000
BB folds
Action to hero

I have seen the sb play 3 hands, the sb has moved all in with AQ os, made an initial raise with A10os, and been all in with JJ preflop. Otherwise I have seen none of his hands and he doesn't play exceedingly aggressive as far as I can ascertain. What's your line here? Are you pushing five handed? calling taking a flop? Call and stop and go if the flop is low? Suggestions to the hand are appreciated.