So for the moment I'm happy to choose invisible artifacts which have a minimal effect on the final use of the image as opposed to a solution which both kills colour and detail in the final use image. In an ideal world it would be preferable of course to have a perfect image at any viewing size, but as my final use is unsampled printing at either 288 or 360ppi on the Epson 7800, what I see at 96ppi on a 30" screen is of little relevance.
Just a comment to the pixel/printing discussion - for a long time I've wanted to be able to do my own printing but have been a bit reluctant due to my low expectations to the printing potential of the 6mp pixel count of my D40 - I haven't been impressed with the few prints I've had made by print labs.
A little before Christmas I finally took the plunge and bought myself an Epson R3000 and some good quality paper to play with during the Christmas holidays - I must say that I'm a little impressed with the print quality I can get from my 6mp files in A4 (300ppi) and it has also changed my view on peeping in 100% on my monitor.
If the C1 implementation of the X-Trans sensor will at least mitigate the artifact issues etc. to an invisible level in A3 printing I believe I can live happily with that.