Should I trade Big Papi? I need your input

[BronxBrawler]

Im in a 15 team points league. I drafted offense first and am now trying to upgrade my pitching. I've been right around 1st place all season so far and want to stay there. I am considering trading Papi, if I can get a stud SP.
My team:
C- Y MOLINA
1B- VOTTO
2B-KINSLER
SS-J LOWRIE
3B- ZIMMERMAN
OF-VICTORINO, HART,QUENTIN, REDDICK
UTIL- D ORTIZ
BENCH-A LAROCHE
SP- C LEE, HELLICKSON,MCDONALD,PETTITE,J ZIMMERMAN,J VARGAS,M Harrison, TREVOR BAUER
RP- SORIANO

My thought is this; If I can trade Big Papi, and maybe a lesser pitcher and get a true ace, I can use Laroche/Quentin as my util bat. Lee will come around, and i have been discussing Greinke OR Haren for Papi and Hellickson.
Would you move Papi for a TRUE ACE? Greinke or Haren?

[BADAMS4]

Johan Santana.. feel out who has him and what he would want before offering Pappi for him.. Also Lincecome could come cheap depending on manager.. Also Zach Grienke is in a contract year, I like players in contract years as long as his stats are solid, which his are and also has a great K rate.. Not getting wins and ERA is a little high,3.46 but with 69k in 65 innings. Food for thought..