hey all
my 2c, depending on budget, buy something that is adequate for your needs. you dont need to pull 180db to have a good system. that is just an INSANELY LOUD system lol honestly kicker are good and arent overly priced. on the same par you can get JL gear. in regards to subs you should lean towards Digital Designs (DD). i work in JB and have my favs but honesltly some of the cheaper stuff doesnt sound too bad either. a pair of JVC 6x9's going for $109rrp goes pretty damn good for that price. for speakers i'd go with JL VR's (or ZR's if you dont mind spending a little extra) or the kicker's. 90wrms for component speakers are very loud. as for the amps id go 5channel kicker which isnt too bad coz its like having 2amps in one. 4x60 (i think) and 1x420rms (pretty good for a 5ch amp) otherwise JL 4x75 as Bonsai mentioned for the speakers and a WARHORSE kicker would be good for a few thousand rms lol
honestly build a system that will make you happy and fits the budget!
myself im using a pheonix gold sub wth a coustic amp, crap sony deck (soon to be updated) infinity 6x9s and kicker splits (very loud yet clear )