I am addicted to the quality of R lenses and have an option to acquire a used DMR. Any opinions about the relative merits of using R glass on a DMR vs. a 5DII, with special emphasis on image quality and on usability factors? I am using R lenses currently on a G1 and on a 5DII but have never shot with a DMR. What can the DMR do with R lenses (at least for those that fit a 5DII) that a Canon (with optional focusing screen and focus confirmation adapter) cannot do? Does the DMRs dynamic range offer improved image quality over the 5DII?