I joined recently to research my options to outfit my 06 civic with some audio equipment. I drive about an hour one way and I am bored stiff. I figured outfitting the car with some aftermarket hardware would help. The factory stereo is adequate but sucks for entertaining me.
I have a kenwood excelon x997 sitting on my desk and I am leaning towards the Sundown stuff. I need 6.5's for the front, a couple of 8 or 10 inch subs for the rear and a 4 channel amp. I will probably go with the SA-6.5 comps up front, the SAX-125.4 and 2 x SD-2 8's bridged to start.
This site (as well as other sites) has a ton of info on just about any brand of car audio hardware and I have a good feel for getting myself going.