Okay, I've noticed alot of posts about what to get and whats the best blah blah blah, so I decided to combine this all into one post. This will be the best overall brand for the specified category. To keep this civilized, PLEASE remember that this is opinion-based, give only one answer per category, and just.... I don't know, don't turn it into a flame war!
Here it goes, the overall categories along with my choices.
Headunit = Pioneer
Component Amplifier = Rockford Fosgate
Subwoofer Amplifier = JBL
Components = Diamond Audio
Subwoofer = JL ......er, I dont know

Monitors = Icon
If you want to add a category that I didn't mention (wiring, battery, online car audio seller), please do. But DONT flame up or choose more than one brand per category. Then again, you can do whatever you want, I'm no one's dad. But I'm trying to keep things civilized.
Peace