The RB is such a great camera! I traded my mint RB-67 ProS to my best friend for his Hasselblad 500C/M and I regret it slightly. Although the Hasselblad is higher quality, I always found the RB to be more versatile due to the bellows focusing. Also, the 6x7 size versus the 6x6 is a major difference in my opinion. The only thing that was a b!tch is the rotating film back only because you can't really get an exact frame size. We also did a side by side test with the 2 cameras and there was no difference that we could tell as far as image quality.
Good luck and enjoy it!