AJs OTB vs. raise from CO...Stars 27.50

[erc007]

PokerStars No-Limit Hold'em Tourney, Big Blind is t400 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

I don't have a specific read on CO, but he is a low stakes winning player. My main question is what to do with these stack sizes? I've only been at this table a few orbits.

Hero (t9070)
SB (t3930)
BB (t12100)
UTG (t13660)
UTG+1 (t10017)
MP1 (t10995)
MP2 (t13837)
MP3 (t8395)
CO (t6705)

Preflop: Hero is Button with A[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">CO raises to t1200</font>, <font color="#CC3333">Hero ...?