1) Agree, the color from the M240 reminds me of slide film as well.
2) Personally I've never seen the need to add sharpening on a digital M. The Sigma DP1 I have seems to make sharper pictures, but when I compare them they often look too sharp, losing atmosphere, if that makes any sense.. Still interesting what a $700 camera (and my original DP-1 is probably worth $200) can do file-wise next to one costing $6380. I can see that by personal taste, one could pick the Sigma (based only on the files, not usability)
3) Wearing glasses, I find a diopter correction lens to be invaluable on any camera I use.
When I shoot the glasses either go atop my head or hang from my mouth. I'm so used to taking them off and on I hardly think about it.