SD card for X100...

After a year of intense cogitation, I finally placed my order for an X100 (black) this morning. It'll be in my hands on Tuesday, B&H tells me.

I'll start out using an SD card I have on hand - Class 10, 20 MB/s. Is this card sufficient to get the quickest write times, startup, etc? If not, what are the specs of the card I should be using? I tried to search the forum for this info but found everything except what I was looking for.

Thanks,

Gary