I was planning to order another couple of SDHC cards.
Class 10 seems to be the fast option.
However I am seeing different speeds claimed for different cards.
claims up to 17BM/sec write speed.
claims 30MB/sec and UHS-1 compatibility.
So given that the Transcend is £8.45 and the San Disk is £10.04 you seem to get a lot of extra speed for not much more money.
Then again, the discussion (which I'm still reading)
seems to suggest that there may be limitations in the hardware/firmware and the Pi may also not be able to fully drive a UHS-1 card which requires a higher voltage.
So is it a waste of money getting the fastest possible card?
Cheers
Dave R