I will be buying a torch in the near future to light my AMNPS. I don't have a propane or butane torch, starting from scratch. Which is better for lighting pellets? Is one preferred over the other? Thanks. At my local big box hardware store (Menards), the propane self ignite torch kit is $15 and the butane self ignite torch kit is $25. I'm not concerned about the $10 difference, but ideally want the most efficient product. Was thinking of getting propane, just in case I'd ever need it for plumbing work.