Thanks everybody for your thoughts on this.
I have taken some time to think about it and I am going to go ahead with getting the new Leica M to replace my M9. I am invested in M glass and I really like the output quality that it can achieve, plus the small size and portability.
I do still really want to get into a high MP MF system, and that will most likely be the Pentax, but I do not see the 8k investment in a 40MP body as justified when a higher MP count body might just be around the corner from Pentax.
I have taken into consideration the fact of having a backup body, and my M will function fine for just that. Whatever new Pentax MF body is around the corner I think will fit the bill nicely. I just can not justify the huge purchase of a IQ260 back, plus body and lenses. Hell, I could get a used 645D for under 5K down the track as a backup body for whatever the new Pentax 645D II body will be. I think I would be happy with that.
10K for a body is about where I see the limit for me personally, and I am fine with that. For a large purchase, I am more than happy to wait.
As always, any thoughts on this are most welcome.