I am very happy with the range, even with a degraded battery, of my 2018 MX 100D. Range around town is still excellent, as I use the regen braking a lot. Highway range is 200-250, at 75mph depending on terrain and traffic. That's usually about 3-3.5 hours, which is a good stopping point for me. 75D would be fine if you only wanted to use in commuting and no long trips. I would go with the 100D. Any degradation should be leveled out at this time.