has anyone just replaced their stock speakers with higher quality speakers, but still used the Mach amps? I use to have a system in my old car, did all the work myself and such, but i just dont feel like having extra 'Kiss Me''Kiss Me''Kiss Me''Kiss Me' in my trunk again, maybe a little qlogic sub box int he corner with an amp, but thats it. So has anyone done this and how does it sound?