[Vecernicek]

You played it fine.

Once you just called with your draw and hit, checking to him was appropriate. The advantage of straight draws is that they are often more disguised than flush draws. You checked the turn and he bet aggressively again which means one of a couple of things:

1) He has a biggish hand that he won't lay down.
2) He has no real hand and he's trying to buy it.
3) He has a medium hand and he wants to buy it.
4) He had a decent hand and now picked up a flush draw to go with it so he is feeling more comfortable.

In two of those scenarios (1,4) I think a check-raise putting him all-in is optimal. In #2 you only lose $$ if he was capable of firing a 3rd bullet, which isn't likely enough to justify a check, and in #3 you may or may not get a call (he does have >1/3 if his stack in now, and your straight is somewhat concealed), but again, given the possibility of #1 and #4 I think you need to move now.

It sounds like he folded, which was probably AK thinking he could get you off a medium pair.

NH