I was never a big fan of Alpine - their decks seemed really klunky to me, however I know that the quality of the sound that comes out is much better than any dolphin-swimming stereos like the ones I used to have. And my audiophile friends always liked them.
Now it sounds like they have a way to measure the interior space of your car and eq the deck properly.
Audyssey's MultEQ acoustic correction technology to "measure and analyze the entire interior space," after which it combines results with a set of equalization filters to produce the best sound for each environment. As if that weren't impressive enough, the integrated RoadEQ is also there to "compensate for music distorted by vehicle / road noise."