Do you hike in those too?
if you're talking about bc touring then yes. the smrtwl phds i use are the ski or snowboard socks so they're knee height... if we're talking about backpacking/fishing hiking; i pretty much only wear merino wool socks year-round, but more of a normal height sock. i have a bunch of pairs if smartwools that tend to be thinner and lighter than the rei merinos (got a bunch of those too) and some wigwams and random brands i've got.
so for snowboarding i use ski/snowboard socks, for everything else i use "hiker" length but in different thicknesses for different shit; but pretty much all of them are merino wool.