I am planning on upgrading my 130 to a Pioneer NEX with an amp. However, hoping to do this upgrade in stages, I was going to first replace the 4 - 6.5” speakers with kickers. My concern is am I doing double the work? Once I get to the adding the head unit and amp, will I be needing to run all new speaker wires from the amp to the individual speakers and have to reopen the dash? Does the Maestro thing help with that? Thanks.