RinB,
I have never owned a 7 RM (although hunted with a borrowed one once or twice), but all the bad press about its internal ballistics and the recent published velocities, which seem a little weak, have given me a bad impression of the cartridge and made me want something else (i.e. 7 Mashburn, 7 Weath, 7x61, etc.). I like the Mashburn and 7-300 because if on a hunt and I REALLY needed ammo. I would use 7 RM in them, which would be hard on the throat of either, but could get you out of a pinch. I don't think this would work with the others.
With that said, the 7 RM could be an excellent cartridge for all I know.
