In my 12-team, long-term keeper league with 40-man rosters and a fairly complicated points-scoring system (not roto, not H2H) I have been offered

Carl Crawford and my choice of Hunter Pence or Trevor Cahill for Eric Hosmer.

The owner making the offer is out of the hunt this year, while I am right behind the leader. Now, I'm fairly set at SP, with Weaver, Hanson, Ogando, Hellickson, Wandy Rodriguez, Cueto, Latos, and Randy Wells coming off the DL soon, but Cahill is a stud and I could certainly flip an SP for something useful.

Pence, well, I know what I'm getting with him (.280, 25 HR, 90 RBI, or thereabouts).

My problem lies in the fact that I'm weak at 1B, with Trumbo and Napoli my only viable options after Hosmer (though Kendrys Morales will be a cheap freeze this off-season, provided he ever plays again). I'm really not looking forward to being gutted at 1B for the foreseeable future, and have projected Hosmer as my long-term 1B option for a couple of years now. I'm not thrilled to sell the farm for a chance to win this year, but is this trade really one I can say no to?