I'd rather point towards
DIYMA.com - Car Audio Forum & 12 volt Community Board
There's always going to be individuals who base installs on trendy knowledge vs. fact. But I've noticed that DIY maintains a small niche group that really likes to spend the time to put science behind their ideas vs. "I saw this at a comp..." If the op is really interested in learning the truth vs. parading about with more snake oil salesmanship ideas I'm sure he'll figure out the mess we call car audio.
Oh yea..."best sounding, loudest, clearest..." I'd like to say that you can probably spend $150 on raw drivers for an install and it could rival Focal Utopias, Be, Dyn...etc. The weakest link in car audio IS the car. Those high priced drivers might make a difference in a perfect environment but our cars are terrible as it is. What it really comes down to in a vehicle is your installation. 10% hardware, 90% install.