Of course there isn't the "perfect camera" for everybody. Right now you can get the RD-1 quite cheap and not everybody wants to pay 4200€ for a camera - it depends on your expectations, otherwise, everybody of us would need an 30t€-combo Alpa+39MPixel-back ;-).
The M8 has great per-pixel-quality, but of course not significantly above RD-1 (because this camera is quite good in that respect - just like a Nikon D70 with excellent lenses) that still means that you have about 80% more resolution with the M8.
And I have tested the M8 with the new Tri, 21-28mm with full quality over the whole frame! But this lens is too expensive for me, I will take the 24mm, = 32mm without vignetting, and the viewfinder is precise enough o use my 90AA at open aperture - what about the RD-1?
But just because you don't need higher quality than the RD-1 brings you, you shouldn't deny qualities other cameras have - at a higher price.
For me it was clear that the quality of the DMR was necessary to switch from Velvia/Provia to the digital world. But it was so heavy, I mostly used the M-system so the DMR was nothing for me. But they said they would come up with a digital M - so I had two years thinking about it and saving money 🙂 Then came the RD-1, I've handled it and it was fun to make digital files with M-lenses. But ~40mm as WA? Files that don't surpass Velvia-quality (scanned with Imacon) and all of this put into a Cosina (I have paid 5times more to get a Leica MP - because the Cosinas didn't meet my expectations) and sold by Epson (the company where I had bad experiences with)? And for 3000€? No way, not for my way of taking pictures.
Over one month ago I got my M8 - and I'm really happy. The banding problem was really not necessary - but they handle it.
The IR-problem cannot be handled at this time, so the only solution are IR-filters (like with many professional cameras before it) - I can live with that, even when I rather wouldn't use filters of course.
Of course you need these filters with the RD-1 too, but when you don't use them, it clearly shows that your photoraphic "style" just needs a special profile, just like the M8 - you only need the filters in very critical situations.
I can't show you the file-quality on the net with small jpgs - but here is one picture I've processed in C1 (50sharpening), no filters, nothing! People said that banding makes the camera unusable...
I've bought a Canon Pro9000 and printed those files on DINA3+ (enlarged with Alienskin BlowUp) and the quality is simply stunning! And the lenses are free from (visible) optical imperfections - they shine with the M8. As I already said, when this quality isn't enough for you, you won't be happy with Leica-lenses + 1DsMarkII or 5D (except for noise >800ASA) either, you would need a MF-back!