In reply to FreshSlate:
1) ME Snowline appears roughly accurate for my body type/condition and the temperatures I've used it at, given that they supply a 'comfort range'.
2) If it's really cold, a H/H base layer set, if it's warm then I use it as a quilt.
3) In no order; warmth:weight, fit, down quality, level of water resistance, & ethical considerations.
4) Exped Downmat UL, Klymit Cush, single malt.
Post edited at 15:26