B low Up is pricy for what it does but...I have it.  I like it and it does a fine job of resizing up. I find it better than going through PhotoShop and resizing 10% at a time..whlich does work pretty well. Fractals is also a way to go...everyone says it does a good job of up sizing.

I have my image software set to 300dpi so that is the "save" version, I assume.  The stuff from the camera all depends on the capacity of the camera and agreed, all already said, what you shoot and what the camera is able to record is what you get.   It all comes down to how you save the files for print.  I save at 300dpi and have excellent prints to A4(foreign stuff to me but not too unlike 10 x8 here?) and larger when needed.   I do have larger images to start with but believe me, resizing properly will often take a smaller file an do a credible job in a larger print.

'nuff said. all has been said already by those in the know.  Thanks for this thread, btw.      TomDart.