I am debating on doing a wall in my trailblazer with 4 15's lanzar optidrives. Anyway im debating on the 6000d or the rf 4000.1 i know rf is good quality but i can get the 6000d from lanzar cheaper. idk what we be better. i guess the question that im wondering is which we be better. im in the next week in ordering a new alternator and im gonna have 4 optimas as my battery bank. IN your guys opinion which one would you guys go for