I have a mixture of components for my stereo system. For head units, I recommend Alpine. They're more expensive but the sound quality is excellent.
I'm running JBL 4" speakers front, Infiniti Reference 6.5 rear, MB Quart 12" subwoofer in ported bandpass. All of this stuff is powered by an Alpine PDX-5 connected to an Alpine CDA series headunit.
I'd go with Pioneer speakers, a sony head unit, and a KICKER OR BAZOOKA subwoofer. take your car to an altenator rebuilder and have them rebuild it and "rewind" to put out more juice so it can fuel your system/U]
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