this is what i suggest. nice component includes crossovers tweeters and 6x5" speakers. for the rear 6x9 2 way. clarion makes agreat components set and also 6x9 sets. then add a nice premier radio and for the trunk a set of nice jbl 1200 watt dual voice coil subs with a 4 channel kole audio 960 watt 2 ohm stable amp, and a mono 1 channel 1000 watt amp would work great. all not too expensive and would sound very good.
components= 145
6x9 2 way=120
radio=200
amp kit=35
subs=80 each
box=35
4 ch amp=225
mono 1 ch amp=275
installation= headache!:doh: