15 left FTP 5k guarantee Button with 99

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The villain in this hand had been using his big stack pretty well being fairly aggressive is this an easy push or wait for a better time?

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t800/t1600
(Ante: t200)
7 players
Converter

Stack sizes:
UTG: t53188
UTG+1: t7472
MP1: t56530
CO: t35331
Hero: t16127
SB: t7375
BB: t12580

Pre-flop: (7 players) Hero is Button with 9[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/spade.gif[/img]
<font color="#cc0000">UTG raises to t3200</font>, 3 folds, <font color="#cc0000">Hero raises all-in t15927</font>,