I went searching for cards today and found this:http://www.amazon.com/SanDisk-SDSDQY...1508994&sr=1-1
Radio Shack as a 32GB class 4 card on sale for $39.99 Amazon is selling a class 6 card for $34.99 which is almost as cheap as they are selling their class 4 cards. I got stupid and bought two.
I have 5 of these cards I bought at Costco that are 16GB and they are fast and have worked for me. I use one to replace the slow azz Cruiser USB drive. I can say these cards are much faster than my thumbdrives and any of my other Micro SD cards. Though not class 10 I have been happy using them.
Reason for so many cards is Kies sucks!!! is is slow as hell and though the SGP is not using Kies it seems slower with the card in the SGP than using a reader. I will use the cards for Classical and Jazz. Longer songs at high bit rates