As a past owner of an R3 and R30, I have to say this is the best version yet. All the benefits of the others with many new pluses:
A few new features have occurred to me since writing my review.
Yes, just like the R30, it will note the exact time and date of each recording. (note: the remote will only display the time of recording)
Here's a tricky one. I recorded 20 seconds of nothing (no mic or line source plugged in) and turned the volume to the maximum. Yes, in a quiet room, I heard hiss. As I never really listen to my MD with headphones on - at a high volume - in a quiet place, I had never noticed this before. I assume that this noise wouldn't be any less on the R30 or R3. I can assure you that this headphone hiss is not immediately noticeable (unless you are looking for it) but I couldn't say if it was any louder or quieter than the R30.
I can't say I can hear any difference in recording or playback quality compared to the R30 (but then, in a blind taste test, I can't tell the difference between MD and CD). I assume the ATRAC version is Sony 4.0 as I am unaware of any newer versions. As for new functions, every difference I have found is in my review.
I don't know for sure but I highly doubt it. I read somewhere that it won't be available until well into next year. And then will there be an international version like the R30? Your guess is as good as mine.
Who am I to say. If it was me, I would weigh up the advantages of the new machine (listed in this review) with the disadvantages (6 dollars more, need to import it from Japan - possible tax and duty implications, and no real warranty cover - although it is covered in Japan for a few months I think). It is a sexy little machine, though, so I would go for the newer R50.
Yes. 6 weeks after my machine arrived I received a bill from UPS for Import Customs Duty, Import VAT and an Ancillary Import Charge amounting to 78.55 ukp. I understand these charges are normally paid cash on delivery but as I wasn't here when it arrived, the bill has taken a few weeks to get to me. I don't really mind as this machine won't be available here for many months and it's a terrific bit of equipment.
Yes. The product and delivery by UPS Express.