Should I trade Joseph Addai?

Should I trade Joseph Addai for Willie Parker, Roy Williams and a 2nd rd pick for next year. This is a keeper league and I already have Stephen Jackson and MJD. And my other WR's are L. Coles, R. Curry and D. Branch...I need help at WR's thats for sure. There is a 3 way tie for the final playoff spot and I feel I have to make a move. The RBBC is killing me in Indy...HELP!