I leave tommorrow on my first trip with my HH Asym I got this winter. I am stoked! I am using a thermarest pad, bag liner and synthetic bag of undetermined degree rating (I am guessing 32). I see now how you all talk about this as an addiction. I am already pondering what upgrades I want to do! I am really leaning towards the JRB Nest underquilt. My question is what commercially available options would you recommend for a top quilt. I rarely do winter camping. Thanks for your input and advice!