Reraise or call with KK, FTOPS $1K

[betgo]

I kind of assume either play is OK, but I was wondering what is best. If you reraise, do you push?

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t120/t240
(Ante: t25)
9 players
Converter

Stack sizes:
UTG: t4325
UTG+1: t10860
MP1: t10785
MP2: t9400
Hero: t4280
CO: t4870
Button: t1745
SB: t15135
BB: t10020

Pre-flop: (9 players) Hero is MP3 with K[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/club.gif[/img]
2 folds, <font color="#cc0000">MP1 raises to t620</font>, MP2 folds, <font color="#cc0000">Hero ???