Well, if you're open to digital post-processing then maybe the ordinary 50 will be okay for you. But then again you can stitch images from the 65...

I don't know about the non L-A 65 but I suspect that it is very good as well. I had an rb 65 that I liked very much- zero complaints. I went to the rz 65 L-A recently when I picked up an rz for the 110.