Cards rarely fail. 8Gb should be enough for jpegs anyway. Later, the cards will become cheaper.
However, may need the larger card at class 6 speed or higher for the video function.
yes, they are rarely fail. good reputable cards especially. you will keep using it and not knowing when will it fail though. 8gb can store 300-600 RAW files, depends on setting and camera model. which is quite good. nowadays memory is much cheaper and it will take much space whenever you need to bring few. it even can fit 2-3 pcs in your wallet if your camera bag is too full and heavy.
very fast AF.
one of the best sensor for DSLR. only best by full frame sensors like D700/D3x.
only draw back that i would like to see is a 1080p30 mode. currently it only support 24p.
and no. i am not buying one.
best aps-c sensor for the time being. same sensor as Pentax K-5.
dSLR is still SLR for still photography, not really a great videography but still a good one.
buying one? i thought you already ordered EOS 1X....!!