I have 2 cents.

recently fed my kenwood kvt 516 a knuckle sandmich, it was hungry trust me! I preplaced it with a blaupunkt toronto 420bt... most definitely the clearest sounding head unit I have ever owned. The bluetooth is garbage though. Had kenwood speakers for a trip to moab one year, i pulled them out as soon as I returned home, they were horrible. I went with boston acoustic component after that only, complaint is that the cross-overs should have been setup to solder the wires in. The screw that secure the wires are a joke. I have recently solder most of them in,Yay. On the cheap spectrum of speakers I've had tolerable results with sony explodes, they are muddy but good enough.