NL 400 KK hand

[Ogre]

This is my first NL post. I am usually a tournament player.
NL 400 6 max
No reads, I havent been at the table long

I have KK utg and make it $12
everybody calls around to the bb who makes it $65
I reraise to $180
folded around to the BB who calls
Flop of A [img]/images/graemlins/spade.gif[/img]4 [img]/images/graemlins/diamond.gif[/img]2 [img]/images/graemlins/diamond.gif[/img]
BB pushes for about $200 in a $400 pot
I have about $200 left. I call.

The only hand i could put him on was AA/AK but AK seemed pretty unlikely because I had 2 of the Kings and I didnt think he would open push if he flopped TPTK. I am also interested in what the right play is for PF. I couldnt decide because a standard reraise would be almost half my stack and have me pot committed if we saw a flop.