Fold or Call?

Here's a situation I was in last night in a multi-table tournament. I'm curious as to what you would have done.

I was middle stacked (about $7000) with 180 of the 411 players left when I was dealt KcQs on the button with blinds at 200-400. There was a minimum raise to 800 from an early position player, a call from a mid position player and a call from me and the big blind.

The flop came QcJc10c so I'm now holding top pair, straight draw, flush draw (not the nut flush) and straight flush draw (the nut flush). Overall not a bad flop.

The raiser throws out another minimum bet that is called by the MP player, but is three times raised by me. The BB folds, but my raise is called by both the EP and MP players.

Here comes the Qh on the turn. A card that definitely improves my hand as I'm now holding a set of ladies, but doesn't necessarily improve hands of the others unless they flopped a set of Js or 10s (to give them a boat). This also now adds the possibility of drawing to a boat on top of my straight flush draw.

The betting for this starts with a bang as the early position player goes all in (about $7500) and to my surpise the MP player calls with the last of his stack ($4500). At this point I'm thinking the EP player definitely flopped a straight or flush. I've only got about $4800 left and there is s huge pot going on that could allow me triple up and be one of the big stacks (if not the chip leader).

The hand could make a huge difference when coming to the end of the tourney and (assuming the EP player has the nut flush) I've got eleven outs that will win me the pot.

-Do you call or fold with all your chips?
-Would your decision be different if the MP player had not called the all-in also?

Leave your comments, let me know what you think.