Buchardt E50 vs Fritz

What specific improvements would you like and what sound characteristics are most important to you?

Agree with soix, more info needed. Buchardt and Fritz both make quality products which are very different from one another. And there are many other good options in the category as well. 

What do you like about Vandersteen, and what do you wish was maybe different?

I have been quite happy with the Vandersteens, and buying an updated pair is a possibility.  But since I will most likely be using a smaller room, like an office, I am interested in near full range stand mounted monitors in a similar price range.  I listen to a lot of singer songwriter albums, acoustic jazz, and a bit of everything else, never at loud volumes.  Looking for a wonderful midrange, and a smooth roll off of treble and bass. I tend to be sensitive to bright or forward sounding speakers.  Since these are both sold direct, I think that they are a good value, but they can't be auditioned at a dealer!