Alpine iDA-X001 Digital Media Receiver designed for iPod
I switched from a drive+play to this head unit because the drive+play was giving a ground loop whine that was drivin me crazy. Anyway, the digital connection made all background noise go to zero, which was a huge relief. The scroll wheel is nice, I can get through my 4400 songs pretty quickly and accurately, which is another improvement over the drive/play. Something weird happens when scrolling through audio books that defies logic, the scrolling jumps around which makes choosing an audiobook nearly imposs