I am thinking of upgrading my stock head unit. However, a lot of brands out there have too much of a "busy" look. I want to keep more of a clean, sophisticated look that blends well with the B4 Passat interior. First, I put new JL Audio component speakers in the front doors and dash. They sound good with the power from the stock head unit, however, if I turn the volume knob too high, the power drops and the 8 disc changer in back skips or stops playing. My installer suggested going for a more powerful head unit so I can get more out of the new set of speakers, which means I may eventually end up buying a new multi-disc changer. Shoud I just spend the dough and get the new "hard disk" head units that hold my entire music collection? Or should I keep the stock head unit and find a place to mount/hide a 4 channel amplifer? I don't know where I would put it, the installer thinks I might have room under one of the front seats, has anyone else upgraded their sound system? What advice do you have? I see this whole thing getting out of control(moneywise) I wanted to improve the sound inside, but not break the bank over it.