Couple thoughts on LS base layers:
1. I wouldn't get a wind-blocking base layer in general. Why? They tend to by their nature to not expel moisture and heat where the wind-blocking fabric is. Instead, put the wind-blocking fabric on your jersey or jacket (whatever the outer layer is). Jerseys and Jackets can unzip (all the way if necessary) if you start to overheat. Can't do this with a base. Their may be value in a sleeveless wind-blocking base to wear under a short sleeve jersey in shoulder seasons, but not winter IMO.
2. With the above said, I also prefer zip necked base layers, just because. Eg. something like the below, (but size down for a cycling svelt fit)
terramar merino base