There are a few threads out there about class of memory cards and all, but class does not equal the actual speed of the card. You can see benchmarks for cards here for example So what I would like to know is 1-does the E-PL1 have a variable bitrate video encoding or does it have a fixed size at max and every image fits in it 2- what is the bitrate (if it is fixed) and what is the RAGE of bitrates (if it is variable) 3-does anyone know what the speed of the buffer is? (to know what is the max speed of card we can even benefit from) The reason I want to know this is because I have the choice of the Lexar Platinum II 32GB for 99.99 or the Lexar Pro 16GB for 99.99. I know this is a fairly technical request, so thanks to anyone who can help! J.