After an extensive amount of research, as well as speaking with some very well-versed people in the car audio world, I have made the decision on the components for my audio system upgrade. A special thanks goes out to Joe from JPM Coachworks for his advice, my installer Jon Dome, and Travis(cartmann32 from SF) for his advice and really hooking me up with tremendous prices on these higher end components. I have done a ton of researching on the audiophile forums, and decided that this setup will suit both my needs in terms of SQ (sound quality) and the limitations of the Solstice interior size. Here's what I plan on doing:
I will be replacing the entire Monsoon system. The door enclosures will soon house the Hybrid Audio Technologies Legatia Series L6 Midbass Driver. The Legatia series competes and has beaten the Focal Utopia and high end Morel components. For anyone that knows car audio, that is really impressive. The tweeter will be replaced by their Legatia series 1" silk dome.

Hybrid Audio Technologies Legatia Series: Check Them Out!
http://hybrid-audio.com/products.htmI will also be using their Legatia series Passive Crossovers. If you read about them, you will be quite impressed...they use only high end materials and ensure that the proper frequencies reach each speaker.

As for the subwoofer, we will be adapting the Memphis Car Audio S Class 10" dual 4ohm voice coil Subwoofer into the stock box...we may just ditch the box altogether and build a new one just for the sub.

Check them out here:
http://www.memphiscaraudio.com/products/subwoofers/sclass-subwoofers/For the amplification, I will be using two of the newest Arc Audio products. They just released a MINI series of amplifiers that are potent, clean, and fit in small spaces. They will be mounted behind the drivers seat on the rear wall, with a custom frame around them which will be visible if the seat is moved forward. For the front channels, I will be using the KS125.4 MINI and the subwoofer will be powered by the KS500.1 MINI. These amps are extremely small, so they will be mounted either one above the other, or side by side.


You can see those amps here:
http://www.arcaudio.com/amps.asp I am very excited, as this will be one of the cleanest sounding systems around when the tuning is all done on it and the speakers are broken in. I am going for a completely SQ (sound quality) system, not one of the highest SPL. I will not be using any rear speakers, as they are unnecessary and will not make a difference. The important thing is that the installation is done correctly and the signal to each speaker is powerful and clean. My installer did my last show quality build in my old Mazda6, which I displayed at Hot Import Nights at Shea Stadium for the Air Force booth. I will keep you posted as the build progresses.