So...not to hijack a thread, but I just returned from my first aborted winter camping trip. I learned the valuable lesson that 30F may be warmer than the nighttime temps you've been having, but it's still 30 degrees!

For three-season trips I've been using a full-length Ridgerest without problems. I started to look at the GG Nightlite torso-length pad to add for winter trips, or to use alone for three-season trips. What do you all use for a winter pad system, and why did you choose that particular combo?