hey!
as far as the headunits go, ive got an alpine CDA 9885i and its sweeeet, plays so well, its never skipped and ive had sum reall scratched cd's in it. features r u can change the colour of ur main opperation buttons between red and blue, u can controll ipod from headunit not from ipod, i think its the same with bluetooth, havnt set that up yet, can have background visuals while lsitenin 2 music, comes up wit notes sayin happy new year, xmas, u can even set ya b-day in it fo it 2 say happy b-day lol as for speakers ive got S type 6.5inch speakers front and back aswell as a 12inch S type sub all amped from a 1200 watt amp and thats loud enought rearview mirror vibrates like hell and cant c out of it when on max vol lol no distortion on front and rear speakers from 2 much bass, crisp & clear music, my girlfriend says she can hear it from her room at the back of the house and can hear word for word, das how clear it is. if S types sound really gewd id think R types or even X types would b crazy!