[mockingbird]

I agree with c/r the flop to protect your hand. You may get players w/ Ax or Kx ( if A and K are not spades ) to fold, probobly giving you more outs. Also could get a gutshot to fold.

If 2/3rds of deck are good cards on the turn, why not raise now to protect this hand.

I think folding the flop would almost be better than calling in this case.

If the turn is not a spade and you c/r the flop and lead the turn, you will get raised by a made flush. You can fold and you lost 2 BB.

If you dont raise the flop you may let players draw to about 7 more outs that can beat you.

I would fold to a turn raise in any case.