JVC makes great little stereos still. Basically a budgeted Kenwood stereo. I love my JVC stereo.
Lmao at all the Sky High hate. I'm willing to bet the majority of the people hating on them now are still running them...
As for Rockford, even their budget amps are real solid. My prime series is a very stout little amp.
I also find it hard to truly categorize the best companies. It depends on the tastes. Bang for your buck, SQ, SPL, SQL, etc. However your stay away from companies I agree with except for JVC.
EDIT: Also note that some of the Opti series from Lanzar are real solid amps.