So yeah I am looking for a winter weather sleeping bag and I have little experience in winter camping, so was wondering what people that know what they are buying prefer and would recommend for winter mountain camping?
A good zero degree bag will work fine. If you start getting in temperatures below zero throw a summer bag and it will give you a lot more to work with.
The biggest mistake I see people make winter camping is they don't have enough insulation from the ground. You should have a 1 & 1/2" of insulation underneath you if your sleeping on ice or snow.
You then can choose between down or synthetic filling.
Down is amazing in mounteeniring or dry winter climates.
Synthetic is great for wetter colder climates.