Cool man. Car audio is a fun hobby. You can really go crazy and spend tons of money on expensive equipment. I hope that I've helped you see if you do a little research you can get really loud without spending too much money.
I'm into home audio too, and just checked out Focal's Utopia speakers. $270,000 a pair. That's not a typo.
Honestly, if most people were blindfolded and listened to some high end speakers and some inexpensive speakers, they couldn't tell the difference. There are crappy sounding speakers out there, but most do a damn good job. It's just like name brand clothing- pants are pants.
I'm glad you got it in and pounding. There are tons of good tutorials on youtube if you want to learn more stuff, and I never mind answering questions. Keep on building man!
