[BugsBunny]

Raise the river - if they fold they may have folded anyways. But if they call that's better for you. Take the sure thing over the maybe.

Lead the turn - whay would you want to try to c/r the turn? You have nothing other than a strong draw. If you think it might get checked through then a check may be OK, but a turn lead is still the better play.

1) You may take the pot down right there
2) Even if you don't you have lots of outs. Any J for the nut straight, a diamond for the nut flush, an A may also be good here (although I wouldn't count on that one too much)

If you check you'll probably have to call a bet anyways (you didn't in this case). A lead bet helps disguise the fact that you're actually on a draw. If you had led the turn you may have gotten your overcalls , even after raising. As it is you put a neon sign out saying "I'm playing a flush draw and it came in" (We know you wanted to, incorrectly, c/r. They don't. Of course the fact that they called your initial river bet argues for the fact that they can't read flashing neon either, but this is 1/2 after all.)