So to make my Christmas a merry one, I've decided to treat myself to a new HU. I've narrowed it down to the JVC KD-AR5500, the Pioneer Premier DEH-P770MP. So far I've got my eye on the JVC, but I don't know if I should save a few bucks and go with the Pioneer. I like the fact the Pioneer has 4v pre-amps but does 1v more on the JVC make that much of a difference? Anybody have any input?