Interesting that you like a 'special' (ie., not vanilla symmetric cheap'n'cheerful thing) mouse. I have not yet figured out (after [mumble] years) whether I want a keyboard/mouse setup that fits like a custom glove (the perfect mouse, the perfect keyboard with the perfect layout (colemak or some such), foot pedals for the shift keys, etc (haven't tried that, yet)) or a setup that I can make work for me at any kiosk... or some middle position between those two. Currently I'm at "make it work".
Now about keyboard+mouse combo... Yes, it's a bit awkward to carry Kinesis Advantage 2 + Evoluent mouse around. I actually don't do it unless absolutely necessary. If I would have to work from someplace for a few days, I would just carry laptop :)