All, Professional still photographer planning to start experimenting with video later this Spring and on through 2018. The experimentation would be personal work or projects with an organization in which I'm a member. Standards are safely lower and I plan to practice before I get people in front of a camera and lighting. I have a reason to add to my SD cards now as I am loaning a bunch of my older SDs to my daughter for her vacation trip in late March/early April. Even a short period with fewer cards means getting one or two up-to-date offerings to make sure I have what I need for my bodies. With my XT-2, and in the future a likely XH-1, I plan - as one project example - to try gathering some needed "interviews". I believe they will be tripoded, but the key card-planning metric is that there'd be 10-15 minutes of non-stop capture - with multiple set-ups - from which a piece with more cuts would result. 64? 128? 256? (those last are expensive...) Of course 300MB/sec. I already have 32Gig 300 MB/Sec cards for the faster slots. 64Gigs and several units? This is they way we'd go for stills. One consideration is price drops across 2018. Maybe not get too crazy too early... I did a search in this part of the forum and didn't find a discussion of this. I hope this isn't asking again something well covered in a thread not found by our Forum's search function.