300 dpi comes from the fact that when printed the output to film or printing plates will be at a resolution of 300 dpi, or dots per inch. Roughly equivalent to the old standard of 150 line screen.
Either of the cameras are easily capable of generating a digital image that will meet those specifications. Well, I suppose that a really big printed piece might be a stretch for their resolution, but I doubt that is an issue here.
The actual image size when opened in a program like Photoshop will be something different than the 300 dpi specification. That is standard, the file is then resampled to the desired resolution and size. The camera setting will read more like "high quality", or better, to ensure you have the maximum resolution the camera is capable of. The end product will likely be down sampled from that when used for printing.
Tough job having to choose the camera. But heck, that's what you get the big bucks for. [img]/ubbthreads/images/graemlins/smile.gif[/img]
Tom
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