I want to pick up a few more extra SD cards for my Nikon D7100. I started looking around and i'm so confused on the speeds of the cards. I shoot RAW and I plan on shooting more video (hence more cards, nothing fancy, just short clips) I've managed just fine whatever card i have (some transcend) that came free with the camera. Now I don't want to over pay for something I don't need. I'm not shooting with a Nikon D4s or a Canon 1DX shooting sports at 12 FPS. Maybe a few burst here and there. But nothing crazy. Thoughts? Thanks!