I am using a Sony NEX 5. I want to shoot sports action using Speed Priority Continual mode at 7fps. To cover a snowboard jump with take-off and landing I need about 20 photos at 7 fps shot in 1 burst. The known problem is the internal memory buffer of Sony NEX 5 is about 120 MB large and fills up after about 12-16 shots and the burst slows down to about 2.5 fps in the end of the action taken spoiling the whole thing. I just bought a class-8 Memory Stick Pro HG Duo of HX series thinking I might finally solve the problem, but the improvement comparing to my SanDisk older card is almost none. I am very disapointed. I can do 16 photos in 1 burst BUT only with medium size jpg option (7.4 Mpix). Can anyone provide some real-practice based advice about exact card model which would allow 20 pics burst at 7 fps in full res 14 Mpix jpg? Thank you.