($33): All-in with a caller, AK out of position call/raise/push?

[xJMPx]

No reads on the caller.

What’s my best line here?

PartyPoker - NL Texas Hold'em $30 Buy-in + $3 Entry Fee Tournament | Level: 2 - 9 players (Converter: PGC)

Chip Counts:
Button: 585 Chips
<font color="red">Hero: 740 Chips</font>
BB: 660 Chips
UTG: 85 Chips
UTG+1: 865 Chips
MP1: 1745 Chips
MP2: 770 Chips
MP3: 1605 Chips
CO: 945 Chips

Hero is SB with K[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/heart.gif[/img]
Blinds are 15/30

PreFlop
UTG is All-In, <font color="blue">UTG+1 folds</font>, <font color="blue">MP1 folds</font>, <font color="blue">MP2 folds</font>, <font color="blue">MP3 folds</font>, <font color="green">CO Calls</font>, <font color="blue">Button folds</font>
Hero ????