Upload & Sell: On
Oh, yeah, the R lenses do command a premium. I paid about $400 for mine from Igor, and that looked like a bargain compared to what I was seeing on eBay. You could try trading the Cron for one and walk away with some cash. I haven't gotten around to the C/Y 35/2.8, so I can't make a direct comparison, but it looks like a good lens from what I've seen from it. If you decide to go this way, let me know what you think. I'd be interested to hear from someone who has moved from a Leica 35 to it.
On the Mamiya, I've only used the C, which is a good lens, very low CA, low distortion, but FC is evident even on smaller formats. The N is supposed to improve that, which is what has my interest, because that would make it an awfully good lens. The C is sharp enough wide open, much better at f/5.6, but one thing I've noticed about the files from Mamiya lenses is that they don't look like they produce terribly sharp RAW files, but just a light amount of sharpening in post has a much greater impact on amount of apparent detail in the images than the same routine with any of my SLR lenses. Size and weight-wise, it's a large lens, much larger than a comparable-speed SLR 35mm, but from that you get a lack of vignetting and good corner to corner performance. You also have the opportunity to use it on a T/S adapter.