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I use a Transcend 32Gb 400x, I've found this to be more that adequate for photographing high speed jets such as the Typoons and Tornado's. As for long bursts of exposure rate, this to a large extent is down to the camera, but again I found the 400x transcend to be very good.
Don't forget Canon will be releasing a new firmware for the 7D on the 7 August which will increase the continuous-shooting buffer depth to 25 Raws, up from the original 15) plus customizable Auto ISO + a few other goodies.
Harry
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