pot commit him

[theBruiser500]

Okay 3 handed in SB with black AA, no read on new player that just sat, I suspect he is okay though. Raises to $40 on button, he has 900 i have him covered, I raise to $120, he calls. Flop comes

Kd 4h 6h

I bet $200 he calls, turn is Qc. Hm, not my favorite card. Pot is $640 he has $650 left. Now, I figure he might have me beat, or he might have a made inferior hand without too many outs. I think the odds of a draw are very low. I am pot comitted so against a better made hand is not worth considering, it's only how to play best against a made worst hand. I decide betting $300 is the best because he could think I have a made mediocre hand and am playing it like a clown. And when I bet all in on the river he will be pot committed. So I get all his money in when he has a worst made hand and don't scare them away by going all in.

Thoughts?