I had 24mm/50mm/85mm/180mm for SLR. For Leica M, I plan to replace 24mm with 28mm because I don't want the external finder, 90mm is the natural equivalent for the the 85mm, and anything beyond 135mm is not practical. I figured I could live with 35mm/f2 + 90mm/f2, but I'm so attempted to the 50mm. With 50mm, 35mm seems too close, so I'm planning the 28/50/90 set.
35/f2+90/f2 or 28/f2+50/f2+90/f2? Can't make up my mind.