I wear my Montane Prism ALL the time, it really needs washing though as it’s pretty disgusting at the moment. Lots of very similar jackets about, Rab Xenon, ME Fitzroy (slightly warmer at 100gm insulation in the torso rather than 60 for the prism, but more expensive as a result). I’d go for synthetic over down as there’s no need to worry about getting it wet and it turning to sludge.