HxC Floppy Drive Emulator

Hi

At the moment, I have a spare 8GB Kingston microSDHC class 4 card and an SD-adapter lying around. Because I've experienced problems with those adapters in the past, I'll probably get a normal 4GB SDHC card for use in the emulator.

Is there a preferred brand (Sandisk, Kingston, Transcend...) that is best for the HxC, or any brands that I should avoid because of known problems?

Is there a preferred speed rating (class 2, 4, 6 or 10) I should get? I know that some camera's have problems using class 10 or faster cards.

Thanks