Re: Thoughts on a couple of HU's...
I started out with a Pioneer, (cant remember the model #) but I switched to the Excelon 995 in my truck and an Excelon 695 in my car and I love them both. The 995 has the HD radio, which is nice, but honestly I never use it. They both have built in bluetooth with external mic, a feature I use every day. That and the USB were selling points for me. The 995 has rear USB, which I mounted into the dash, the 695 has front USB. They have front, rear and sub RCA outs, so its easy to run 4 channels and a sub. I picked up 2 of the Segon Mini USB drives from Newegg, which only stick out from the radio about 3/8", almost not even noticeable when plugged in. I purchased both HU's from Crutchfield.
Vehicle: '99 Ford F-150 Extended Cab / '98 Chevy Cavalier LS
Head Unit: Kenwood KDC-X995 / Kenwood KIV-BT900 w/ HD Radio
Sub: FI Audio x12 4ohm w/BP 1cu ft sealed / 2 GTO804's 1.4 cu ft @28Hz
Sub Amp: Hifonics BRZ1700.1d /
Front Door Speakers: Massive Audio CK6 / Massive Audio CK6x
Rear Door Speakers: Boston Acoustics SL80 / Massive Audio VX69
Amp: MBQuart DSC4125 / Massive Audio NX5
Wiring: All Knukonceptz
Sound Deadening: eDead 45 / AT60 / Murder mat BL
References: Retroaudioinc, davidtemple, cd6551, double07, Ssteele18