The One and Only
The Tracker is the first beacon I ever used and it just seemed too simple. I bought one once I moved to Utah and took an Avy 1 course with Exum (so should YOU!). The Tracker never got more complicated throughout all our training and my own personal practice. It makes so much sense to me that I can't imagine using another, or ever needing one...so much that I bought my girlfriend one so she could have the same simplified search interface when we're out together. Hopefully we'll never have to really use it.
P.S. BCA is one of the best companies in the industry because they sponsor classes and beacon practice parks for everyone to use. You dollar is your vote, so vote for a company that does something to address the risk associated with selling avalanche gear to the mountain-going masses. Buy BCA and take a class. It just makes sense.