I have an older helmet that I'm still using but would definitely get a MIPs helmet now if I were buying one. During the cold months, I just wear the same helmet with a neck gaiter. A scarf also suffices if I'm feeling European that morning.
You'll want some really warm gloves too if you're going to be riding out in the cold.
I was hoping that OKC could have gone all the way this last season. It would have been a breath of fresh air to see a young team with a lesser known superstar win it all. I always root against Texas teams for social political reasons so was bummed when they were knocked out.