Hand from WSOP 2000 NL

[HiatusOver]

Blinds 200-400 Ante 50...1053 started. 230 people left, avg stack 11,000.

Villian open raises in the Cut-Off. He has a bunch of highly stacked 100 and 25 dollar chips which I think is around 6000 at the time. Folded to me in BB, I have K [img]/images/graemlins/spade.gif[/img]Q [img]/images/graemlins/spade.gif[/img]. My stack is 6700. I think about moving in but am not sure how much villians stack is and dont feel like asking because it seems weak and no matter what he is getting good pot odds on an all-in call. Also, I read his 5xBB raise as a decent hand with some showdown value 66-JJ, AK-AT, KQ...not sure what else. So, I end up calling 1600 more with 3100 in the pot. I think the PF call is right but I am more than open to criticism. The flop comes A [img]/images/graemlins/spade.gif[/img]2 [img]/images/graemlins/spade.gif[/img]3 [img]/images/graemlins/diamond.gif[/img]...I have 4700 in chips left. What is my play if he has 4000 left? What is my play if he has 5000 left?