I think the new MBr:s are welcome and I would go for a MRr as the original MB:s may suffer from warping due to the long drac line and not even the drac bracket every time would fix this completely. This would not apply if one has a repro playfield for the original MB, but if one is a purist, one would have an original restored playfield in it instead and as said, it may suffer from warping.
And it would be huge, if MRr would feature the "planked playfield" as illustrated in this forum as an option