OK, first a rule change. I don't have an interchangable lens 35mm rangefinder. So how could I vote for 28MM? My Mamiya Super Press 23 has 50mm, 65mm, 75mm, and 90mm available. I have the 65mm which is a 28mm equivalent. I don't know what would be a 35mm equivalent, perhaps the 75mm would be closest.
I don't have it and don't want it as in SLRs I have found 35mm just isn't my cup of tea. I just don't care for it. I don't know why. I have had one for about 30 years and I bet I haven't put 10 photos through it. Just me I guess, as I know it is a favorite of many. I love the 50mm (100mm on the Press), but when I want to go wide, I want at least the equivalent of 28mm. I once took a photo of a mill in Clarksvill, TN, that I really like. It was done with the 65mm. If I had a wider, I would have used it, but really, the 65mm gave me a more interesting shot.
All that to say, I voted for 28mm.