I think what would be helpful is the ability to press mark then a number to specify something. I personally have marked so many tracks between emplode visits that it becomes pointless for me to try and remember why I marked it. (It's almost as bad as when I was trying to remember problems to fix with 1.03. I only connect to my car player via emplode every month or two).

And to not break the ease of simple quick marks, make the default not need a number pressed, and just timeout after a bit of waiting.