I'm looking for recommendations for an inflatable sleeping mat for four season use, either as a winter complement to my ten year old NeoAir classic (which I might still use for summer), or to replace it. Primary use would be backpacking and bivying. Main priority is warmth. Weight does matter but for an inflatable I'd prioritise durability. Prepared to pay up to £200 for something that will perform and last.
I've found various reviews and forum posts, but nothing particularly recent. The NeoAir X Therm seemed to be well regarded, but I'm wondering if theres anything new that I should be aware of?