NL game at the Stone
 

I've been in the game about an hour and it descent. I sat down with 1500, and im up short money.
I get 44 in early position and limp for 20 3 or 4 people limp in and the cutoff makes it 60. The button calls, the blinds fold and everyone else calls.
Flop comes K43 rainbow
Checked to the button who is fishy, he bets 50. I make it 150. The cutoff and the button call. The cutoff has 300 or so and I barely have the button covered.
Is all in or big bet on the turn the only move?