Hi KenK,
I prefer the Primus Omnifuel stove as it burns everything the MSR dragonfly does including LP gas. (Butane, Propane, Isobutane mixtures etc)
http://www.primus.se/primus/Flash/Produktfilmer/player_promnieng1stor.htmlCombine this with a Gasmate adapter and a Markill Campingaz Adapter and you can burn the majority of gas cannisters on the market.
BTW it would have to be really cold i.e. around -40 degrees Celsius for propane to be affected. Even liquid fuels such as Colmans White Gas would start having difficulties at these low temperatures. Using a standard Coleman 30/70 propane/butane mix cannister using a Primus Omnifuel with a liquid gas feed i.e (inverting the cannister in the same way as the Coleman® Exponent® Powermax® Fuel Adapter), operational temperatures of around -20 degrees Celsius are available.
The gas cannisters are lighter, more reliable than using mechanical pumps, easier to use and don't need any priming.
Coleman® Exponent® Powermax® Fuel Adapter