stereo upgrade

[creisa]

Looked at Dynavin, Eonon, and Avin. I have Premium sound with Nav. My q is: what if I rip all that shite out and put whatever I want. I know I would lose Nav ( have a GPS)- don't need. Don't need/want backup camera- my neck and mirrors work just fine Could care less about bluetooth/phone. Would lose some DSP- so what?. seems hardest part is speaker rewire (easy in my book, just time). So the q is: is it do-able? Would be a hell of a lot cheaper, sound better for what I already own. New head unit, speakers, crossover, sub and bam- should be doable.....?