In reply to Oak28:
I owned a Lhotse, it lasted me 5 winters, 4 of them Orkney winters where it was in daily use in all kinds of weather, before I retired it due to zip failure, and failure of the membrane at the back of the neck. At the time I thought it the best jacket that I have ever owned, but the thin 40d fabric occasionally jammed in the zip - I am pretty certain that this contributed to its eventual failure.
I have replaced it with the ME Tupilak, which uses 80 denier fabric, and has a much more robust feel to it. And the zip doesn't jam! Despite using heavier fabric, the Tupilak is about the same weight as the Lhotse. It has less features though, no pit zips or side pockets being the most obvious, but I don't miss these. I love it - well worth the £265 that I paid for it two and a half years ago (Joe Brown/The Climbers Shop sale price).