Today I use SanDisk Extreme Plus 32GB.
80/50MB/s read/write speed
But will buy something faster soon.. Mostly takes photos for now, so speed isn´t a factor, exept when you download to your computer.
Samsung PRO 32GB has 90/80MB/s read/Write
Kingston have similar Product..
I have thinking of
SanDisk Extreme PRO, with 95/90MB/s read/write.
Have used these Extreme PRO (CF & SD) for several years and they always perform well.