The more I think about this I really think checking behind is the best play. If we get check raised the pot is 7.25BB back to us, and I'm going to have a hard time folding b/c villian might be doing it with a hand we beat or something like KK that we almost have odds to continue with. Also, we might not be losing taht many bets by checkijng behind if villian is going to fold something like 99 or AK UI. We might actually get a bet on the river from these hands taht we normallywouldn't. The only downside IMO is that we are giving free cards to hand that we currently beat, but against a tricky opponent I think checking behind might be best.