Best Buy has one of the worst car audio selections around. You get a 50% discount on everything but when your choices are limited to Sony, RF, and LA... You are not exactly gonna have the ability to get into a huge variety of equipment. I say just try getting a job at a local shop. Offer to be a non-paid intern for a length of time and then see if you can get in that way. It's better to be working with people who care about what they do than taking advice from a half-assed drone(minus a select few) that just tries to sell whatever is on the shelf.
Igitur qui desiderat pacem, praeparet bellum -- Vegetius
"I told her about my conversation three years ago with the political leader of Islamic Jihad in Gaza. "What's the difference between suicide, which the Koran condemns, and martyrdom?" I asked. "Suicide," he replied, "is done out of despair. But remember: most of our martyrs today were very successful in their earthly lives." In short, there was a future to live for--and they detonated it anyway."