airbag conversations...
It sounds like you are on the right track with the most important gear, and you are correct in assuming that you would be adding another tool to your belt with an airbag. There are a few things I would remind you of: 1) if you can master the effects of wind on snow and master reading slope angle, then you can avoid 75-80 percent of all dangerous avalanches; 2) the airbag is expensive, difficult to refill, and the majority of victims die from trauma, something the airbag will not protect you from. So, a sledder can buy the airbag, the beacon, the shovel, the probe, and maybe even the avalung, but when a slide puts you into rocks none of those tools can help you; the only tool in your belt that can cover all possibilities is prudent decision making in the mountains. If you shoot for the above number 1, then you shouldn't need an airbag, but you should carry an pocket inclinometer and dig pits. Snowmobilers hardly ever dig pits, but they are ready to buy more gear, and this is one of the many reasons the fatality trends continue. I encourage following the avalanche accident reports on avalanche.org, as one can learn something from every one of them, and you will see many of the things I am talking about directly related to the accident.