Well I've always been pleased with Nokia Belle on my E7, and feature pack 1 on the 808 has further improvements over that.

There are plenty of reviews around the web so have a read, of course if you don't have interest in an amazing camera then it might not be so worth considering.

The ultimate for me of course would have been the 808 with MeeGo, but rather Symbian than WP7 any day of the week.