I would get rid of it. If he hasnt beat you already he is drawing to beat you and will probably bet you out on the river after you check to him. I try not to make it a habit of calling a large turn bet unless I have position or a made hand.

Gotta realize that there were a lot of limpers in that hand..in a situation like that when I have top pair I usually bet a 3/4-pot sized amount on the flop, and if I get called Im pretty sure Im beat and can let go out of the hand without further involvement.

Also I dont like only doubling someone's flop bet. They usually call, and it doesnt really give you any information about their hand. I like making larger raises, usually pot sized or a bit smaller if I want a call. If I get called, again I can let go of the hand without further investment.