High end car audio installation - help needed.

[crxvtec]

Hello all,I want to do a stealth SQ install in my Cayman. I already own 2 amps from my old car (RF Power 50.2 and RF Power 250.2, both in Chrome) but don't have to use them.The car currently has PCM and Sound Package plus, so 3 way fronts, a 3" centre channel in the dash and 4" midrange rears - no subwoofer.PCM has 4 speaker level outputs, so these need to go into a processor (Alpine PXA-H800, Audison BitOne or RF 360.3?) so that the output can go to amps (I'm thinking JL Audio HD900.5 and HD600.4; the former running active tweets and mids in the front plus subwoofer, the latter bridged to run midbass in the door). I really would like to keep the PCM if possible, though there may be justification to replace it if the output via a processor is going to be significantly inferior to a modern HU with digital output.Speakers - I'm considering either Morel Elate Limited Edition, Morel Elate 903, Dynaudio Esotec System 362 for 3-way fronts, and the JL Audio stealthbox in the rear.Questions:1. Which 3-ways are best in this car?2. Are JL Audio HD amps good enough to get the best from high end 3 ways?3. Should I be going passive instead, by losing the HD600.4 and simply bridging the HD900.5 to run 150W to each front side?4. Which is the best processor for SQ?5. Will an SQ'd PCM be significantly inferior to a high end Pioneer/Alpine double-DIN navigation unit?6. Is this design flawed in any way? Can it be designed better?Thanks,C.