I'm probably going back to the X30, I have a long haul now from the parking garage to my building at the new campus. Every ounce counts, and I haven't even broken in my fall shoes yet (yikes).
I kid you not, I almost tripled the number of steps I take daily when I did a test day at the new place. With two laptops already being hauled daily, paperwork and the sundry corporate drone supplies in the bag, it just all adds up.