All of my non-road bikes have Race Face Next R series Carbon cranks on them. (2 sets are the SL version.) These have worked out really well for me. Over the years, I was able to purchase them for about $200 for the cranks, and up to another $150 for the axle, bottom bracket and chain ring/s. They are lightweight and so far for me have been very durable. In the older days, I really likes FSA lightweight carbon cranks for all of my road bikes, and some of my first mtb bikes.