I'd be tempted to take this deal..
In all honesty, your team looks to be lacking in the hitting department. I mean, you have Moose and Goldschmidt as starters in a 12 team league. They would be good backups, but shouldn't be starters IMO. While you do have a good source of SB, I would probably take Bourn (or Hart/Stubbs) and try to package him with Napoli for an elite hitter (Preferably a 3B) or SP. I would image a lot of teams could use Napoli for their catcher. He loses some value for you at DH IMO. And since you have Santana, you can afford to move him.
Your pitching staff could certainly benefit from a reliable guy like CJ Wilson. Though in all honesty, your staff is mainly comprised of gamble types of pitchers- prospects, guys shifting from RP to SP, and guys recovering from injury (I count 7 SP who fall into those categories). Zimmerman, Hellickson, and Pineda are certainly established and improving. But you are going to need some of those gamble guys to work out to remain competitive. With or without CJ Wilson.
Bourn is good in a H2H league as he could win you SB by himself. Take him and package an OF + Napoli for an established stud SP or a better power bat.