I keep reading great things about MB Quark. Any idea what they sound like? Also, how the heck do you demo car speakers?

My first thought was the MB Quark QSD 216 component speakers for up front, and their QSD 164 for the rear deck. Amps...I haven't a clue. I'm hoping that much like home audio, a good amp is a good amp. Something like this? Looking at Alpine only because I've read (though not confirmed) that the stock head unit/nav system is built by Alpine.

I've also emailed Reus Systems. They do custom installs. Thought they may be able to provide me with some good info, if not do the job for me.