Transcend Ultimate Speed, SDHC, 16GB, Classe-10, USC-1, 85MB/s
I just bought 2 of the above card from Amazon at £12 each with free delivery.
I was worried that the USC-1 would not work after previous problems with C10 cards.
It is brilliant.
Compared with my Kingston 16GB, C4 time to write an image is at least halved as is the time to boot the pie.
Great price too.
No this is not an advert just wanted to share.