Was about to post about the Tracker 1 issues. Ya beat me to it. I have a Tracker 2 and it works very well for me. It's a popular beacon too, which means you will probably have friends with them who can help you with it if you need.
Also, because its more important than anything, TAKE AN AVY 1 CLASS. Your gear is worthless without the knowledge to back it up... and its very important to understand how the snowpack works, and that sometimes you need to trust your gut, even if it seems stable and skiable.
Also... depending on where you ski, I think an avalung pack can be a good investment, mainly if you see getting stuck in tree wells as a regular danger. Not that it's not a good avalanche tool, I just think that it has a dual purpose for sure.
And yeah... an airbag. I wish I could afford one. Although, the entire goal is never having to use your gear in the first place. I think it's crazy how we spend so much money on gear that we hope we never have to use. But its completely necessary.