Let me open by providing reads on the villain. Villain is a very aggressive player and skilled post flop. He is a tricky, thinking player that varies up his game and changes speeds well.

This is the second heads up sit and go we are playing, in the first one I ran up to an early chip lead by trapping with aces. I however got chipped away, due to not having cards I could call his pushes with when blinds were high. In fact most of the hands I got dealt when he shoved were dominated, as he showed his hand. Eventually blinds got to the point where I was the one with the low M. I called his All in shove at the 150/300 blind level with 1300 or so chips with AJ in the bb. He had Q7 and he made trip sevens to knock me out.

Thus far in both sit and go the villain hasn't really been out of line (in particular in a big pot), we for the most parts have been playing small pots with selective aggression picking up most pots for both of us. The hand mentioned below is only the third big hand we have played in both sit and go's. In the hand below I believe the villain is fully capable of having both the nuts (a flush of some kind) as well as a complete bluff.

I am playing a heads up sit and go vs a friend. We both started with t2600, first blind levels are 5/10, 10 minute levels -- very deep stacks.

I estimate I have around t2400, villain has t2800

I am dealt 6h 6s in the small blind I complete for 5 more.

Villian raises to 50 total. I call.

total pot 100.

This is the perfect result for me if the villain actually has an overpair because I can go set mining and play a hopefully huge pot.

Flop comes 9c 7h 5h

Villian leads out and bets 70, I raise it up to 200 total he calls.

total pot 500.

I am using this raise here to find out if he is on an overpair or just overcards. If he calls I decide to put him on an overpair.

Turn 4h.

Villian bets 300, Hero raises to 1000, villian goes all-in... hero ????

total pot 3650 -- my remaining stack 1200 -- approximately getting 3:1 on my money, but its for my tournament life.

This is a great card, it gave me a huge draw to the straight flush, but obviously it is also dangerous, depending on what my opponent has. If he has an overpair with a heart, all my flush outs are gone. If he has a made flush, obviously I'm drawing very thin to my two outs. If he has two over's with a big heart -- I'm in good shape because I am ahead now.

What's the move here? More importantly, what do YOU put the villain on here and why???

One additional comment I wanted to add with this hand, is I played it a certain way last night -- but after further considering it today, I think as of now I would play it differently.