I priced out a car audio system for my new car today, which includes MB Quart speakers and a separate amp. The choice of a head unit is still up for question. They carry Pioneer, Alpine, Eclipse and Sony units. I narrowed it down to either a $360 Pioneer deck or a $240 Alpine deck. I've had Pioneer before, and really liked the sound of the mosfet design, however since I'm getting a separate amp to power the MB Quart's it really comes down to which has the best transport and tuner. Anyone know? And should I consider other alternatives?