Nordic backcountry setup for above treeline
I am a novice skier and trying to figure out where nordic backcountry skiing ends and Tele/AT begins.
From what I have read so far, I understand that nordic skiing is usually done on 'hikable' terrain (<30 deg slopes, scalable with snowshoes), while Tele/ AT skiing is meant more for a 'mountaineering' style terrain (30 deg+ slopes, crampons, ice axe etc). However, I find little information on use of nordic setup on 'hikable' alpine terrain. For example, several 14ers in Colorado can be scaled in winter via low angle ridgelines with snowshoes. However, most online discussions regarding 14er skiing go into 'ski mountaineering' realm and begin and end with AT gear and high-angle couloir descends.
So far, I've taken a lesson in XC and then done 3-4 beginner un-groomed trails in Colorado. I am 5'11" and weigh 165-170 lb. My aim is to be able to ski on hikable terrains- both below and above treeline- in a easy-going fashion. While I would like to do multi-day touring at some point, right now I am more interested in long day hikes. The most strenuous hike profiles that I would like to ski include 2500-4000 ft elevation gain in 5-15 miles round trip, including some easy 14ers. Currently I use snowshoes, but looking for a faster and less tiring way to traverse. I am not interested in speed or turns (definitely not tele turns) per se, but would like to check the speed using turns (snow plough, step, or parallel turns- whichever works) wherever necessary. I am hoping to get a one-ski quiver for this and based on several online reviews and discussions, it seems I have 3 options:
1. Skis such as Madshus Eon, Fischer Excursion 88 or Rossi BC 90 with 3-pin cable bindings, and leather boots such as Crispi Antarctic. Here I am not sure what size skis to get.
2. Shorter (~160-165 cm) and fatter skis such as Madshus Epoch or Annum or Altai Kom with 3-pin cable bindings, and Excursion or Scarpa T4 boots
3. Altai Hoks. Not sure what size/ bindings/ boots.
Are these setups reasonable for most 'hikable/ snowshoe-able' terrains, even above treeline? (I intend to carry microspikes for icy conditions.) I understand skier skills matter a lot, but seeking the general norm here. Which of the three setups would you recommend me for the intended application?
Additional questions I have concern the Hoks:
1. Would the universal bindings suffice for both 125cm and 145cm Hoks for the above application?
2. Has anyone successfully tried rigid-soled mountaineering boots on the universal bindings? If so, I will be tempted to use Hoks not just for the hikable terrains, but also as approach skis for mountaineering terrains: ski to the base of a snow climb (say a 30 deg+ couloir), climb it using crampons and mountaineering techniques, glissade down (I'll be too scared to ski down such slopes), and then ski back to the car. The compactness of Hoks is intriguing in this sense.
3. In the above (#2) context, I wonder how the universal bindings (with alpine boots) compare to Silvretta-style bindings often used for similar application
Thoughts, comments, suggestions, and criticisms are welcome.