After all your good advice to another forumite I thought I'd post my query.
I am looking for Bag for my wife and another for myself, with 2 slightly different specs!
For the other half, I need a bag which will keep her warm at altitudes of up to 5000m, in a tent whilst, on trekking holidays in the Andes or Himalayas. She will not be carrying it so weight isn't a massive issue other than the obvious 15kg for everything that the porters/sherpas/yak etc will take. She sleeps cold.
For myself my bag must do all the above but I will on occasion be carrying it, mostly between huts/bivvies both in the UK and the Alps, so weight and pack size are more of an issue. Also I can't stand liners as I'm a fidgeter!
Also in both cases build quality and ethical down are pretty important, and whilst I don't which to sell a kidney I am prepared to pay for quality.
I have done a fair bit of research and have a few front runners in mind, however I will keep my ideas to myself to avoid queering the pitch.
Thanks in advance guys.