I'll tell ya tomorrow. I have a cda-9857 with the new iPod interface coming from
crutchfield, just to test it out. I mean, whats there to lose, I can send it back in 30 days for a full refund. I actually was wondering how fast the new alpine interface was, so I searched for a video of someone using it, and it seemed pretty fast. The two complaints that i read about most is 1) the faster you turn the knob on the HU, the songs don't scroll any faster, its at a constant speed, unlike on an iPod. 2) When you want to go back to a previous 'page', it starts from the top of the list, instead of where you were previously. Alpine has helped us out with both of these problems by the 'percentage skip', or whatever its called. Pretty much, the 1-6 buttons on the bottom advance you a certain percentage of the list, so you don't have to scroll all the way through. So, if you're wanting to go to Three 6 Mafia, depending on how your list is set up, you could hit the '4' button, which might take you to 'Scarface', then you can scroll untill you reach the wanted artist. I think a lot of people forget/don't know about that skip feature alpine has included, and thats why there are mixed reviews on some internet sites.
As for the other manufacturers, I don't know much. If I can remember correctly, Pioneer's is decent, except it goes to the top when returning to previous 'pages' just like the alpine, and I think the Alpine interface it a touch faster. Thats just from what I've read.