130 would likely be more boot then i need and i'd think the 120 would be fine for me at 140lbs. How much will i give up going to the 110? Are there any differences between the three other then stiffness rating and $100 jump per model? Online search of Technica's site indicates same liner in all, hardware looks the same too.
I'm on a Salomon X-max 120. It's stiffness is fine for me, the fit is pretty good too, feet get cold easily. Picking at straws here but curious to try on a pair of Mach1's to see if the fit is as suited to my foot shape as the X-max but even more precise for increased performance. I need a low volume instep with anatomical toe box and narrow heel. So far the X-max has come closes to meeting those needs.