C/r flop is interesting. I wonder, though, how many villains are capable of betting without holding at least A9? I doubt it gives any fold equity to speak of. (Or is that not the point?)
In general I would bet somewhat heavier on this flop, but since the pot is nearly half your stack I like the smaller bet, that implies you might still get away from the hand. This way the villain might be more inclined to push with worse draws and you still have outs against flopped sets and straights. So your bet was good. It still charged him enough to not profitably call with his SD, too.
I think bet/calling is ultimately the most profitable way to handle the flop, as opposed to shoving it outright, though obviously the downside is that we can get in an awkward turn spot like this. As Campbell92 said we are very much committed, check/folding is too gross. If it checks back there are a lot of river cards that make life suck even worse (that J was a good example). If v bets we have to call anyway, so I would prefer to bet myself.
So basically I'm saying you made the right choices at every turn...so much for pointers. Oh well.