BD Missions are really well made. I just picked up a Mission Jacket for this season. pretty much the same material on the Arc Teryx Sabre jackets (3L Gore tex C-Knit backer, lite micro fleece, 70D weight). . the material is more stiff but not crinkly. However, for the price, BD is hard to beat. I think the Mission jacket is on the same level of quality as ArcTeryx however, I like the Mission jacket's design better so I assume the pants are of the same quality. they are a free ride cut which I really like. Not super snowboard baggy but allows layering and excellent freedom of movement. I like the extra high collar too.
I would look at a pair of uninsulated pants (shells), then pickup a couple different layering pieces. I have 3 different weights of base layers ranging from a 150 wool to a heavier, mid-weight and then a full on insulated Mountain Hardware Compressor pant for those days where it never get out of the single digits, snowing all day and the skiing' prime.
https://www.moosejaw.com/product/mountain-hardwear-men-s-compressor-pant_10451753. Most insulated pants have 40grams of basic thinsulate or similar, but understand that all insulation is not the same. Most is not breathable and depending on the type used, will compress which makes it much less effective. Having layers will allow you do adjust to the environment.
I am a big fan of the Arc'Sabres, Stio Objective Pro and Flylow Compound (and chemical for that matter) the new eVent DV material and new Gore Pro materials are superb. Tough but very breathable. I just picked up Flylow's new Compound Bibs (2021/2) are my new favorites due to the half-bib configuration (you can also zip-off the upper portion) paired with the eVent DV expedition fabric is ideal. Super tough and highly breathable and windproof/waterproof. I dont think they are too baggy, I want them to allow plenty of movement.
BD Mission Jacket and new Flylow Compound bibs ( and of course,Giro helmet and goggles).