What I have currently: Alpine CDA-105Ei head unit Pioneer TS-W258D4 10" Sub + pioneer monoblock amp Music: Hiphop+electro/dance type stuff Will most likely be buying off ebay. (dynamicautosound or the like). Was looking at a set of Pioneer TS-A1702C for the rear ($160). Not sure about the front. not sure about amp. Speakers mounting: Front door panels (not sure on depth but not a lot of room- could use spacers) Rear side panels (plenty of depth avail). I am thinking 2 sets of components with 4channel amp as this system will be for a long wheel base van. If I have to be biased, I would prefer a better front stage as most listening will be from drivers seat. Looking for SQ over volume. Suggestions?..