Don't let the track number hang you up too much...
Sooner or later you'll want to start making & loading custom maps which will help out greatly.
Your micro SD card will save a lot of ACTIVE LOG tracks also which you can download later.
gumps's the only person I know running the 500, screens a little larger & looks nice, but there's
lot's of people with the 60 series on here too. Anything will take practice and continuous use.