I have Pioneer head unit - Infinity for high's and mids - Fosgate amps and subs. Thats my current setup as far as brands. Your system will only sound as good as your headunit will allow. Unless you wanna waste money on external crossover and equalizer's. Your high end headunits should already have those built in. Pioneer and Eclipse is all I will run from now on. My wife has a nice Sony headunit and it does the job(came with the car). So I usually go with what I have dealt with in the past and from close friends word of mouf! :blah: