i've had two clarion decks, both were good but didn't last very long. i'm now using an eclipse deck which is nice and is supposed to be a great deck and all...i think i got a lemon, twice. my first eclipse skipped like mad so i had it replaced. now my current eclipse deck skips once in a while and the shop that installed it is now out of business...so i'm basically fucked. i've heard lots of good things about eclipse though, so don't let this tale deter you, just make sure the shop doesn't screw you.
i've heard that panasonic decks are comparable in sound quality to eclipse for a couple $$$ cheaper.