I need to pick up memory card for a NEX 5 camera. The Eye-fi looks awesome, and would add geo-tagging functionality in addition to wireless file transfer, but the fastest cards they have are class 6. Do you think the difference in write speed between that and a class 10 SDHC card is enough to forgo the cool Eye-fi features in favor of a faster memory card? Or is class 6 simply plenty fast for a 14 megapixel camera?
p.s. I know that this also depends on other stuff like the speed of the camera's DSP and the size of its buffer. But I don't know enough about this camera to give much in the way of details about that. It's probably safe to assume that in those respects the camera is at least on par with the best micro four-thirds cameras and entry-level DSLRs. If you have experience with other cameras using both speeds of cards, I'd like to hear about it.
edit: grammar