In reply to jack_44:
I have the Citadel one you mention. Some thoughts that may help your decision:
* It's warm and really cosy, like a big duvet. As an indication of warmth - I have used it as an ice climbing belay jacket in Norway (say -5C), as a backup in the Alps (say -10C), and also for Scottish winter mountaineering. Good for cold/damp camping in the UK too if you have space.
* I got it in a sale >50% off a few years ago, but it's really expensive new (£300?). IMO you could probably get something a lot cheaper and just as suitable for the uses you're looking at.
* If you might use for winter mountaineering/climbing in future - it is bulky which means it takes up a lot of bag space and also can be a faff to get things from under it / get it out from under other things. This might just be me being a punter though. On the flip is massively reassuring anywhere it is cold / harsh / damp / high, as you know if things go wrong you can just get inside it and be snug.
* Good if close to a luggage weight limit for a climbing trip as it has big pockets you can fill with heavy stuff and wear/carry it onto the plane.
Hope this helps
Post edited at 15:18