If I were thinking of getting an M240, I believe the greater size and weight that has been reported might be the issue for me. But as I'm a wide-angle kind of guy (mostly), a .68 finder is OK with me. I keep waiting for them to come out with a digital model with the .58 finder!
What is the widest frameline on the M240? If it's 28mm, it can't be a 0.85 finder.
Actually, I have noticed that some ergonomic issues that seem off-putting when handling/fondling/examining a camera are not a problem when actually using it. My M9 is bulkier than mp M6; but when it's time time to use it, I just pick it up and shoot. So maybe the M240 would be like that, too.
May the light be with you.