One more AKo on the bubble

[rickw]

$10+1 Party NL Holdem tournament.

Blinds are 150/300; 4 players left

I'm on button w/ about 2500.
Bigstack is utg w/ approx. 3800; he's been a superlucky calling station, calling allins w/ axo;kxo, etc. and getting lucky when dominated.

SB has about 60 chips left after posting 150. Weak Tight

BB has about 1200 chips left after posting 300. Tight.

Bigstack raises to 600; I'm looking at ako;

Do I fold (on the theory of don't mix it up w/ bigstack on the bubble and why not wait for sb to get knocked out)?

Do I reraise? If so allin? There may be a little fold equity, although this guy was such a calling station that I couldn't count on that too much. In all likelihood I had a better hand, based on past experience with the guy.