Having recently placed an order for a D700 I've been considering the pros and cons vs. a D3 (while I wait for it to arrive). One of the big trade off's for me is not having that second CF card as a back up should one card fail. I'm very thorough when it comes to backing up - but one of the major potential pitfalls that awaits me is the potential for lost images from a CF card failing. This got me thinking - what's my plan to manage CF card failure? My feeling is that I may stop using my older cards when they get to a given age to try to prevent this. With this in mind I'm keen to hear whether anyone here has a schedule for retiring CF cards after a certain number of years service and any reports people may know of on anticipated CF card longevity. I'd welcome comments/suggestions. Thanks.