99 on the Bubble

[bluewilde]

BB with 1300. 4-handed. 100/200

UTG (1500) folds
Button (2500) calls
SB (400) folds
Me (1300) Push

Now in a Party Game, this is baaaad isn't it? SB is too low to play romantic hero against LAGgy big stack when top 3 are paid, right? In any case this is a Noble short-handed game, and only top 2 get paid, so I feel like this is a must move spot. However, Button's limp says Broadway/weak ace, and he's the kinda guy that calls all-ins with these hands (he has the lead after adeptly calling all-in from AA with QJ). Do I still push being fairly confident that he will call and I will be a 13-12 favoite (I'm pretty sure those are the preflop odds for underpair vs. two overs). In this case, the blinds have me convinced this is a must push, but what if they were 50/100?