Push post-flop.

You are putting the pressure on anyone with a raggy flush like 56c or QJc. They may lay down a weaker flush. Only hand to worry about is AQc for the nut flush. So moving in will pressure the made hand.

If you do get a call you have a solid redraw to a FH to bust the flush.

If you just bet pot or less on flop you are essentially committing more thatn 1/2 your stack and not puting the same pressure on you opponent.

If you bet anything less than pot or more you are inviting the draws to come along.

The way the pre-flop action went you have to think that the set of K's is best and pot is plenty big such that you don't have to get cute. If your opponents are calling $4 pre-flop raises with AQc you are at a good table.The biggest worry is someone with AcA or maybe they caught a set of 10's with the 10c and suck out on you with a 4th club on board.

Overall, your post flop hand strength and chip position would justify an all in but by no means do you have an absolute "lock" on this hand.