Arguably the very best is Borah Gear, incredible weight for warmth, but they're not making jackets for another few months. PHD are now charging too much to make a good competitor to the others, but if you need a jacket for -15º or custom dimensions I'd still go there first.
(Note: synthetic may be more appropriate than down for a given usage. Or fleece. It depends.)
I've got a couple of the Uniqlo ones at this price point (IIRC £60?) and been very happy with them. One of them now lives in the car in case of emergencies, and the other get thrown in a bag when travelling as a "just in case" item.
The best down jackets:
Arguably the very best is Borah Gear, incredible weight for warmth, but they're not making jackets for another few months. PHD are now charging too much to make a good competitor to the others, but if you need a jacket for -15º or custom dimensions I'd still go there first.
(Note: synthetic may be more appropriate than down for a given usage. Or fleece. It depends.)