I love the tapered end of the Classic cart. If there were similar for Dura I'd use them.
Druid - the Dura is what I use out - I think the main reason I prefer the Dura for out and about is that it is less concentrated in each puff. For instance, sometimes I have a puff on Stick or KBC and it is like, too much (I have a light head). I mean, let's just say you're getting friendly with the checkout girl, and you take a massive puff on your platypus, and your eyes start pointing in different directions as you give her a compliment while taking the change. It's not going to look too good is it?