I found a North Face Assault 2 on ebay that I am likely going to bid on. I'm thinking that a four season tent will be a better investment for my first winter trip. As HJ said, I can always put some warm clothing on to help the bag out. I have a nice Exped Synmat inflatable pad as well as another thin inflatable.
so far I have been hiking alone....perhaps it's time for a hiking buddy to join me.