I'm thinking of getting tweets on the pillars, 6.5in coaxial (not sure how many ways) or just 1way woofer front speakers, replace or remove the 4in rear speakers (if i do replace them I'd turn them quiet but just loud enough to slightly brighten the subs) & 2 8in subs. I love rock. What is your opinion on my set-up? Coaxial vs. Component, Advantages & Opinions?