Wasn't there a thread that calculated the approximate time/distances for responses while driving.

Empeg controls are all contained in a small area, generally the remote, which you don't have to discard if you need to do som 'creative' driving.
With a CD, you have the cases lying about, the CD in your hand which you wont let go at any cost.. blah blah blah

empeg is safer, even with visuals on