[tor]

Bet the turn. Please bet it. With your flop play, slowplaying the turn isn't an option in a pot this large, because it's so large he's calling anyways. Build it up. That river card is great for you. Don't stop at all.

If anything, I think the only question here is your flop raise. It's only gonna scare out other flushes which you want around to call if the turn card is favorable for them. Given the size of this pot as is, it's more attractive for callers to call that 1 BB on turn than 2 SB on the flop because of the size of the pot.

PS don't worry how to play flopped quads, or quads at all. it happens so rarely it couldn't possibly be much of a leak at all.