Whew...Just took a deep breath. This is promising. If it wasn't for sync I'd just get an AVIC Pioneer system and be happy but Sync just offers too much to throw it away.
Can you verify that I wouldn't really need the Re-Q5...just the RE-Q. I have the same speakers all around so I wouldn't think I needed to get so granular. The Re-Q should handle everything in the car, right?
Also, did you have a factory sub? I have a 4channel amp to power the speakers but was going to leave the factory sub on it's own. It's an experiment but I dont want to re-buy everything.