Thinking about dipping into MF. I adore shooting people. have somewhat of a darkroom set up (would just need 6x7 neg carrier and 90mm for the enlarger)

I've been looking around toronto C-list, and some RB67's with lenses are only around 350.. I know its a heavy camera, but I'm used to shooting the heavier nikons with a 20-35 2.8, so I can't imagine it being terrible... or am I wrong?

How do you guys feel about MF? what do you like about it? is the 'slowing down' and quality difference justifiable for the weight and different style of shooting, given that I don't enlarger larger than 11x14 most days?