FIRST GUY: I agree with SUCKMIKEHAWK on his speaker choices. By far go with components for the front. In addition to MIKE's choice I must add Infinity and Kicker seperates as well.Personally I am not a big fan of Eclipse components, but that is just my opinion, otherwise they are quality. Definetly spend more money on your front speakers then your rear as they are more important. HU wise I would recommend getting that first. Eclipse makes a monster HU as well as Pioneer, Alpine and Kenwood Excelon. If you are getting all aftermarket speakers please power them with a seperate amp. Trust me if you are going to do it.. do it right. Amp wise Rockford Fosgate, JL, Kicker make nice amps. Again depends on your $$$ situation.
SECOND GUY: I am not a big fan of Clarion to begin with. Again go with components if you can they are really worth it. In fact I would almost recommend components rear and front. It can be done. My friend has that in his 91, 4dr, Civic and it sounds very nice.
HU: Kenwood CD w/ Kenwood Chg
FRONTS: Kenwood DB+ Excelon 2-way 6.5"
REAR: Kenwood 3-way
MID/HI AMP: 400x4 Fosgate Punch
SUB: 12' Kicker VR
SUB AMP: 250x2 Fosgate Punch
**Soon to come... anything but those front Kenwoods, possibly Infinity Perfect Seperates