I can only recommend two, either a buffalo special 6 or the montane extreme.
The buffalo is a good bit of kit and warm, the pile is a bit softer than on the montane and seems to work better when used against the skin as intended, the waist adjust helps to keep it close to the body to keep wind out but wick sweat away. The cut is a bit boxy and can be tight at the shoulders unless you go a size bigger (This might just be me). The hoods are gash and aren't worth their money.
The montane is better cut overall with less arm lift when climbing etc.. it also has some nice features such as re-enforced elbows and forearms. The pile is thicker which makes it warmer but its standard microfleece type material at the collar and bottom of them hem, as well as under the arm to help with overheating , it also makes it look a bit better. The hood is excellent on these, and very warm. The zips are slightly more chunky and don't snag as much as on the buffalo.
I can also recommend the extreme jacket which i use as a warm layer for a walk, work, camping etc.. Its a bit more larger cut than the smock but is still very warm and the hood is still excellent. On my jacket the hood attaches with Velcro and poppers, but the smocks it's a zip (Don't know why).
If i had to choose i'd go for the extreme smock every time. Make sure to try it on (Go outdoors stocks them) then buy the correct size online, as they can seem a bit on the tight side since they're cut to hug the body neatly.
Tonyuk