i’ve got SanDisk, A-Data, Transcend, Kingston and Centron Cards and they are all fine with the fuze. Definately stick with class 4 or 6.
8GB Class 4 or 6 microSD cardsd are @ $20 or less on Buy.com and newegg all the time. supermediastore.com has deals too, but buy/egg usually have the free shipping.
cheapest i’ve seen for a class 2 16GB microSD card is $45
when i see a class 4 or 6 in that range, i’ll be purchasing one.