Ok so for a head unit I have a Alpine TDM-7582:
http://reviews.cnet.com/in-dash-car-stereos/alpine-tdm-7582-radio/1707-6729_7-30231919.html
Right now I have two front speakers (JLs) powered by an amp which is an Alpine Somthing:
(the 2 rear speakers go right to the head unit + 6 Disc Changer)...