The gap between renegade and mxz was narrowed with the 129" coming into play. Myself I have a 129" this season after many with 137's. Depending on the year I could choose one or the other personally. I kind of feel as though I would lean towards a 137" sled again if I were buying new.
For your stated concern, more off-trail than on, definitely Renegade. I will also note that I have a 2012 TNT with 120" track and the on-trail ride is much more choppy than the Rene. Since I value smooth ride in the trail chatter, in hindsight I should have went Rene even though I'm 95% on trail. I ride with mostly Rene's and the ride difference is very noticeable. The 129 is intriguing though... But not for you.
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