[bluefeet]

MP, HU with BB...it's my expereince that you can just about count on a lead from MP, following a check from you. I'd be looking to c/r this flop. If he bet anything resembling full-pot, I don't think pushing over the top is too much. If he hits it for t200...you'll be looking at a 450 pot, with 1340 back. Considering his stack size, quite possibly holding a high/nut flush draw, I wouldn't bother with a standard 400-500 raise. If he called, and a 4th heart does hit the turn, you're looking at enough chips left to consider giving it up on the turn.

Picking up a 400-500 pot from the blinds at this stage of the game is huge....c/r all-in.