
Originally Posted by
Feielle
The BestBuy thing is a generalization. True, there are some morons out there, but I worked at BestBuy for 4 years and I know a fuckton more than anyone else in here about mobile electronics, I'll bet on that. Any shop has morons. First and foremost, talk to the people there. If you don't think they're competent, move on. BEST THING to do: ask to see their own car. I've never known an installer that didn't put a system in their own car. If it looks like ghetto shit, walk away.
Personal recommendations: Pioneer is one of the cleanest head units you can buy. After that, I'd go with an Alpine. in my opinion Alpine costs about 25% more than they should just because of the name, but they're still good units. Kenwoods have always sounded "pingy" to me... to metallic, I don't like the quality of the sound from their decks.
Don't buy anything Sony Xplod brand. Speakers, amps, decks... all crap.
For door speakers, Infiniti really can't be beat for quality. Polk is a close runner-up, but you'll shell out $260-300 for a decent pair of 6" separates. Splurge on the fronts, save cash in the rears - they're only really there to flesh out the soundstage anyways.
Get a capacitor - at least 1 farad if you're running 2 amps, .5 farad if you're running just a sub amp. Especially on something like an IS300, you don't want to starve anything of power. Modern cars are built very specifically, and there's not a lot of leeway in the charging system for an additional 20-30 amps of draw under heavy load.
A 10" sub will be fine for most heavy rock/metal. Look for a dual voice coil; they can articulate the motor mechanism of the speaker more rapidly than a single voice coil can and will be able to keep up with faster basslines more accurately.
There's a ton more i could ramble on about... but maybe you should come back with a few more specific questions once you've gotten some research done.