I always assumed fast (Class 10) cards were most useful for video, not so much for still photos. When I got my camera, I just threw in an 8Gb Class 4 card I had lying around. Yesterday, I was in Staples for other reasons and saw they had a 32Gb Class 10 for what seemed a quite reasonable $30, so I threw that in my basket too. What a difference in file saving time!!! Saving RAW is nearly instantaneous. Worth every penny. I'll keep my old cards for spares, but I heartily recommend spending a few bucks on the fastest card you can. Makes a big difference for not very much money. I remember when 2Gb SDs were near a hundred bucks. At today's prices there's no reason to skimp. P.