In reply to TobyA:
So I went to the shop and tried on the Mamumt Nabu, Mammut Spire and ME Centurion. Quickly ruled out the Spire as it was too heavy, but looks like a good jacket for people after something rugged, fit was good as well, a tad more roomy around the middle but not as to be an issue in any way.
The Nabu and Centrion both Neo shell, the Nabu had much more of a soft shell feel to it that the Centurion and was a little more stretchy. The Nabu was a good fit with no issues with roominess around the middle as I have heard mention (im 6ft 80kg/13st)hood was ok. However compared to the the Centurion is was a non contender, the ME jacket has to be the most comfortable shell jacket I have ever tried on and the hood is just phenomenally well designed. The fit was absolutely faultless for my frame. The fabric felt more hardshell like than the Nabu but still had some stretch (probably useful when tucked in a harness)and non of the traditional hardshell rustle.
In terms of the perceived durability (ie what you can tell form touching it in the shop) it didn't have the feel of a heavy weight mountain jacket but then its not a heavy wight mountain jacket, I think for people doing a mix of activities ie a few Scotland winter trips a year, maybe mtb, hiking etc etc the durability would be just fine. For those crawling up granite chimneys weekend after weekend then this would not be the jacket for you. I would say it felt more durable than many of the Goretex Active shell jackets I have seen to give a comparison. The proof of the pudding will be in the eating!
Anyway I bought it so we shall see how it fairs.
Hope these notes may be of use to others looking for jackets at the moment.