I personally dont see too many people using kenwood anymore. I know their new Double Din looks pretty cool but I haven't personally used it yet. I myself like either the Eclispe units or the alpine. Eclipse is way more affordable at around $2500 all the functions that you want with it. The Alpine will probably be around $3200. Only downfall to the eclipse is that for their bluetooth they use a parrot ck3000 kit which is a external control ****. the rest use integrated units that can be controlled through the screen.

And yes they are different systems, they are all different cars except for the one with the painted fiberglass. some are using the pioneer units, some are using eclipse. Ive only taken just a few pics of the many that I have done.