Good stuff. I have always kept to 4GB for my cards, since I swap them between devices regularly. Using MTP mode, refresh times have never really been an issue, a matter of seconds.
I swap the cards depending upon whether I’m in an audiobook or music mood (the latest Audible scheme allows swapping the media between Sansas, a nice change).
The monster 32 card is tempting, especially since the price has come down to an affordable level. SInce I have the little guys plugged in regularly, I simply swap the cards with various collections.