5-10 hand w/ a straddle, fairly deep

[wazz]

Bet turn if he pays off light. Lots of danger cards if he is holding a 7 with 3 higher cards.

[RoundTower]

checking the turn is really bad, betting is much better for getting paid off by 66 or (more likely) 7xxx. Maybe he's even hoping to cr you with 73 and will get scared off by some rivers. Also you don't really want to give 7xxx a free card.

[Runner Runner]

Reasons to bet the turn:

How could he call your flop raise without at least having a 7 in his hand (depending on his sidecards he probably has 6-9 outs).

If a card above 7 falls on the river and he bets, do you still plan on raising?

You said he pays off lightly.

*I could understand your reasoning for doing this more if u had A7 on a 77A board.