Head Units: Kenwood.
On paper Alpine makes a good Headunit, but thier quality is hit or miss, I know from experience. Me and two friends got Alpine headunits that needed warranty work numerous times.
Amps: Again, Kenwood.
I had a Kenwood 4 channel amp running 5 1/4 Infinity Components and (2) Boston 12'* bridged at 2ohm and it NEVER failed once. It would get hella hot when pushed, but NEVER faulted in 5 years I had it. It now pushes 2 RF 10s in my Younger Brothers Town Car.
Mids/Highs: The most realistic sounding are from Infinity. In thier price class Infinity will walk over the competition.
Subs: Boston Acoustics.
While hard to find a dealer, and a little costly, these subs will put anything to shame in the same price category. The best out there! You will not be a lemming with these.
2005 Dodge Magnum R/T-Can you say...HEMI?
1999 Bonneville SSEi-Going Fast...With Class!
1989 WS6/L98 Trans Am-Got Torque?
1999 Grand Prix GT-Wife'* Widetrack
1995 Camaro Z28-Project Bitch