Umm i highly doubt that the speakers in the Serenata are ICE powered. That just would not work.
I find the leather case quite attractive actually and i'm pleased to read that it's an included feature. These built in speakers, however, are going to want to sound pretty special, otherwise i see no point in this feature.
p.s. IT IS NOT AN IPOD! It is a Bang & Olufsen! It is something of exclusivity and the highest quality.