I have a wonderful M9-P and I love the image quality it produces with my 24mm Elmar, 35mm 'cron, and 90mm Elmarit. I like having a backup camera, and have used a Fuji X100 alongside the M9-P. The Fuji has some absolutely maddening faults, but, with it you can produce some stunningly good images.
To replace the X100, I just got a great new Sony NEX-7 body and a good M-lens adapter brand new for $1000. I know it has red edge issues with WA lenses--not unlike the M9 early on--but it the image quality is everything it is touted as being with my 35mm 'cron mounted, it may prove to be a great solution alongside my M9-P.
The longer I wait for an M240--and no one seems to be able to predict when I might see let alone get one--the more my minty M9-P--which I must sell to fund the M240--declines in value. It really hurt when Leica unveiled the M-E as its stop gap digital M and cut the price by about 25%. That may have benefited Leica, but it really de-valued the M9/M9-P resale market and made the M240 that much less attainable.
Someday, when I can try the M240, I will evaluate the image quality it produces and see whether it may be worth the expense. I am not terribly optimistic given the reviews thus far. To me, when it comes to image quality, it sounds as if it's no better than what I already have, though I do like a lot of its features--battery life, reduced high ISO noise, viewfinder, weather-sealing, etc. Time will tell if my M9-P, my glass, and my NEX-7 offer me a better overall solution than the M240.