I have an OM-1 and an OM-2sp
I think the 1 is a much better camera. But I'll trust the 2sp meter in a way that I can't even imagine with other cameras. I can use it in "normal" lighting at any EV and it's 100% reliable. I use the spot meter if I think the lighting is tricky.
BUT, I really hate the minuscule shutter speed dial and rough film advance. Oh, and even though I wear glasses I don't find it easier to see the corners of the frame in the 2sp than the 1.
To answer your question about missing out I wonder that to myself all the time. Maybe it's a case of the grass always being greener, but I've SERIOUSLY considered buying an FM2n, 28/2.8 55/3.5 and 105/2.5 because I have, to this point, been considerably less happy with the pictures out of my OM kit (28/3.5, 35/2.8, 50/1.4) than with what I got out of the little konica auto s2 I have which is sadly broken now. I can't sell or trade my OM stuff because it was given to me, but if it weren't I would have gone to Nikon already. Mostly because it is only now that I can even think about making the move up to an M2 and some CV lenses.
Maybe it's all in my head. I would like to try Nikon but what stops me, ultimately, is that I can chose from an FM2n (low coverage finder) or an F/F2 (HUGE camera to me) and I really do like the OM-1 body.
I would be immensely interested in some sort of Leitax style kit and/or adapter solution for Minolta MC, Nikon F and C/Y to OM. Or someone with some 100% crops of the lenses Im considering compared to the OM equivalent to set me right (if I am indeed wrong) which I assure you would ease my mind considerably.