Yes, I am pretty happy with my 24-105 for sure and it is one of my most used lens.
with that said, I wouldn't mind the benefit of improved optics and an updated IS technology.
Please, don't get me wrong...I am looking for an "upgrade" BECAUSE I am so pleased with this lens. There are small tweaks that I would appreciate. I mean, if there isn't an upgrade...it isn't like I am going to cry...
And even if I end up getting a 24-70 f2.8 or the mythical 24-70 f2.8 IS I doubt that I would get rid of the 24-105!
And on top of it, I was just asking to see if there was any ideas floating around.
So, JAcosta's question is indeed a valid point. I would love small tweaks and the distortion at 24mm is more in the side of "need" as well as "nice to have". The IS - is only "nice to have" and I have yet to hear of too many photographers who would turn down their favorite lens with an optical upgrade! 