[Double Down]

I played a $1,000+50 1 table tourney today at the bike. 11 players, 3rd gets money back, 2nd gets 3200, 1st gets 6600.

I am heads up against a player who is very aggressive. He raises almost every pot preflop and will bet out if he has anything, even 3rd pair.

Ok, so the blinds are 100-200. I have 6200 and he has 4800. I'm in the small blind/button with K7 hearts and raised frankly because I knew he would raise if I didn't.

I made it 500 and he calls. Now, he is a loose caller but he wouldn't just call any 2. He would call with SOME kind of hand, though, Even, say, 45 suited. By the way, if he had an ace or a pair, he would've reraised. OK, so the pot is 1K I now have 5700 and he has 4300.

Flop comes 10,7,2 all spades. He checks to me. What is the right play?

Things to consider:
1. He is very aggressive, so the fact that he checked means he seriously doesn't have anything. If he had a pocket or ace high he wouldve reraised me preflop. If he hit any pair on the flop, 2 pair, or even a set, he would've bet out even though I was the preflop raiser. So I was pretty sure that I was ahead. The only thing he has that currently beats me is if he flopped a flush.

2. I can't give him a free card because pretty much whatever comes on the turn is a scare card. Unless it's a 3,4, or 5 non spade, he could've improved. And if I check, he is guaranteed to bet the turn whatever he has, and I'll have no idea where I stand.

3. Because he is very aggressive, he is capable of coming over the top of me if I make any bet, and so if I bet, say, the pot which is 1k, he could easily push on me and I won't be sure what to do. I'd probably fold.

4. I have 5700, he has 4300, pot is 1k. A push feels a little extreme. But if I bet 1500 or less, I know he'll push with any 2. What should I do???

Results to come later