Should I trade Gore for Andre Johnson and Philly D?

Sorry for a repeat question, but I would appreciate some additional views since my season rides on this. My RBs (start 2) are Peterson, McGahee and Stewart. My WRs (start 3) are Cotchery, Housh, Curtis, Walter. The idea is to use some of my RB depth while improving the sorry state of my receiver corps. And improve my defense, which I need too. Thanks.