i have a 91 mazda navajo 2dr. i wanna step it up from my single 10" sub. i have my mids pretty much taken care of, have 3 pairs of components one in the back, one up front, and one in some kick panels. plan on replacing them eventually with better quality speakers .. but my big question is, in my specific vehicle. what would be the easiest way to accomplish a hairtrick with keeping my sound quality and relatively budget friendly... i was planning on 2 18" but now i am not sure.. everyone please gimme ur input i wanna keep my options open and hopefully get alot of ideas i never thought of.. brands i may not have checked out, enclosures, anythin u think would help.. thanks !!!!!!