Your move?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $1/$2
6 players
Converter

Stack sizes:
UTG: $197
UTG+1: $330.25
CO: $300.65
Button: $77.40
Hero: $212.95
BB: $171.15

Pre-flop: (6 players) Hero is SB with K K
UTG raises to $7, UTG+1 raises to $24, CO calls, Button folds, Hero ???