I'll Second Key_metric's point of view, and add my own.
Head unit: Eclipse or Macintosh
Amps: Precision Power (PPI), make sure you get the good ones, not the lower line (I can't remember how they are distinguished, except by the specs).
Speakers: MB Quart. No question. Go top of the line and go for the competition crossovers and with proper installation, nothing (IMHO) can touch them.
Subs: JL Audio.
Head units to avoid like the plague: Sony, including the ES line and Alpine, unless you like severe digital glare.
Kenwood, unless you like ridiculously bloated bass and
Pioneer, unless you like having the midrange scooped out of your music.
I realize a lot of this is subjective, but at least it will give you a refence to start with. With these brands, expect to spend in the range of $4-5K including install to get top of the line with excellent sound. Hope that helps.
Head unit: Eclipse or Macintosh
Amps: Precision Power (PPI), make sure you get the good ones, not the lower line (I can't remember how they are distinguished, except by the specs).
Speakers: MB Quart. No question. Go top of the line and go for the competition crossovers and with proper installation, nothing (IMHO) can touch them.
Subs: JL Audio.
Head units to avoid like the plague: Sony, including the ES line and Alpine, unless you like severe digital glare.
Kenwood, unless you like ridiculously bloated bass and
Pioneer, unless you like having the midrange scooped out of your music.
I realize a lot of this is subjective, but at least it will give you a refence to start with. With these brands, expect to spend in the range of $4-5K including install to get top of the line with excellent sound. Hope that helps.