regarding the need for a lot of editing...

In Garritan, the effects section is set up very well for tailoring effects to the instrument. In my example, I added reverb with a long predelay and a long decay, and that was enough to make it sound pretty dang good. However, if I were using it in an actual project, I would definitely tweak the velocity and volumes to make it as realistic as possible.

I'm not sure there is a tweak-free solution out there. The stuff they're doing with Imitone in these videos is surely not the results all the early adopters are getting, or they'd be selling it as a finished product already.