i've put about 35,000 miles on my 2013, including a few long distance road trips from Minneapolis to NYC, Seattle and Dallas. i'm planning to ride to and through the Grand Canyon this summer. i've seen a lot of folks speak highly of the Mustang Tripper Fastback seat and wondering if it is worth investing the shekels to upgrade from the OEM seat. with the OEM seat, i tend to need to get off my keister for a few minutes every 125-150 miles in order to ride 500+ miles a day. i'm wondering if the Mustang (or some other seat) would make much of a difference. Any recommendations?