Is a SDHC class 10, fast enough for highest quality on AF100? using the PH:
1920 x 1080


32GB
Class 10 Speed
Read Speed: 24MB/s
Write Speed: 17MB/s

I use Sandisk Extreme Class 10 / 30mbs cards in 32gb and 16gb sizes - never had any problems

also got some Verbatim Class 6 / 16 gb cards - as I remember the AF101 won't let me shoot Variable Frame Rates with these but otherwise they're ok

I always shoot 1080/25p at highest quality onto the cards

Short answer: yes.

Longer answer: some "generic" Chicom cards labeled as "Class 10" really aren't. Buy SD cards through a reputable seller such as B&H, NewEgg, Adorama, etc.