Need some input.

I've always been a shorts guy, whose "long pants" consisted of layering long johns under the shorts for cooler weather, or using my rain pants if I really needed long pants. However, lately I've been on a couple of trips where the long johns weren't enough, or the rain pants were too hot. So, I'm looking at picking up a pair of long nylon pants. (Narrowed it down to the OR Equinox or Equinox Convert pants.)

My question is: Do you all prefer plain old long pants (with perhaps a pair of shorts in the pack), or the zip-off leg style that converts to shorts?