Here's my .02...
I had the ipod cable hook-up that goes in the glove box about two years ago with my alpine head unit. Older headunits require a hookup chord that has a box (that process' the info from the ipod) on the chord that connect from your headunit to the ipod. This set-up is EXTREMELY slow and annoying, as you can only scroll as fast as the box can read the information. It would take as long as a minute for me to scroll from my "a" artists to my "g" artists.
But now alpine has a technology on the new headunits where the chord you buy for the ipod hookup does not have a interpretation box on the chord. The new headunits are "full speed" made for ipod. I have personally used these, and it scrolls almost as fast through the headunit, as on the ipod itself. Notice the full speed icon: http://www.alpine-usa.com/US-en/prod...model=CDA-9885
Make sure you get the full speed headunit if this is what you want. Otherwise, I prefer the setup of running a Monster Cable to the ipod that plugs into the headphone jack. Although it does not power the ipod, I find using the ipod itself is SO much simpler. Plus you can buy an AC charger for like $10 for the emergency case of needing it. The sound quality is just as good as long as you buy a good chord like monster cable.
Pros of glovebox setup:
- no wires showing/clean
- amazing sound quality
- Not as simple to use
- Limited play options
* can only play first 250 songs of a playlist
- may forget ipod in car more often over cold nights or hot days(terrible for ipod hardware)