In reply to Dan Bailey - UKHillwalking.com:
Thanks for the comprehensive reply. I had already read both the reviews you linked, they were very helpful to help me understand the issues and to filter out other jackets on the market.
As you say, it seems that fit is important along with availability and price. I have owned both Rab and ME jackets previously and been very happy. I live in Norway and I am going to end up buying online so I can't really check the fit very little Rab is sold here and almost no ME. I know what size I have had from these brands before and they have fitted well so that is something.
A group test of these kind of jackets could be really useful, in a similar way to what you did for the Winter shells.
They only thing I wonder about now is if I should consider Rab Muztag which is the one they recommend for climbing, it is that much beefier than the Zenith I worry it would be too much and I might not want to take it up a route/ too heavy for running but maybe I am mistaken - anyone with personal experience? I can see the Muztag could be great choice if you could only have one jacket though.