For those who don't know my checkered past regarding winter camping I have:
1. been a Nordic patroller in N.W. Pennsylvania for 10 years.
2. done a lot of winter camping in PA.
3. Taught Army ROTC cadets winter survival for 3 years. (Such fun inserting with them from a Chinook helicopter!)

So, here's my standard winter gear:
> heavy winter tent - old Eureka! 3 man (er, person)dome,
> stove - an MSR Dragonfly,
> bag - a (heavy) Mt'n. Hardware -20 F. Polarguard Delta bag W/side opening zippered gore to make room for adding an inner bag like my WM Megalite down bag for EXTREME sub-zero temps.
> boots - Sorrel feltpacks W/ VBL
> long johns - Cabela's Polar weight Thermastat
> pack -Dana Terraplane
> vest - 300 wt Polartec (& the only fleece item carried)
> insulating coat & pants - W/ Thermolite Micro insulation
> shell parka - EMS GTX mt'n. parka
> shell pants - double layer nylon windpants
> gloves - Cabela's GTX shells W/ sevreral removable pile liners
> hat - O-R fleece Peruvian style

I can lighten the tent and bag. I'm loathe to spend the money for down insulating jacket and pants for camp after I spend for a down winter bag but may anyhow.

I see no reson not to at least try a Caldera Cone Inferno. They have good reviews and would save fuel weight.