I'm thinking about a fast 85 or 90mm lens (preferably an old Summicron) on the R-D1, too, especially since I have a Canon 135mm finder (from the VT-VI) which could be adjusted and fixed into the right angle to work with the Epson. But I'm not shure how often I would take such a lens out of the house... like the 135 Canon which is catching dust...
Didier