I'm personally waiting to get another cold weather stove until a paradigm shift in white gas technology occurs.
I've used a Whisperlite plenty and they aren't useless, but they leave so much to be desired. I've had mixed results with canister stoves in the cold. Used them down to the teens with success, and also had them not fire at 30 degrees with "bag warmed" canisters in both cases.
Warm weather I still kinda dig the JetBoil, with an edge to the Snow Peak Giga's for low CO output (and weight...until you start talking about Ti vs. aluminum pot heat transfer, JB heat efficiecy, etc.---then things start getting complicated).
Barring technological advances, next fall/winter's cold weather system will consist of my MSR Wind Pro, canister inverted in sub freezing conditions.
