Vandersteen

I am not understand what falls to pieces means.  Symphonic works could be the way your source and preamp send the signal, same for rock.  

The Sigs will do justice to some fine quality gear so the point-of-no-returns is likely elsewhere in your system. Vandersteens are very sensitive to toe in, tilt, and distance from walls but "falls to pieces" on complex works sounds more like a speaker control (signal) problem as noted above.

I've been listening to mostly hard rock and the blues through my 3A Sigs for the last 5 years.  In no way are these speakers deficient while playing that music.  You received some good insight in the last 4 posts.  

I've heard the 3a and Treo ct many times and they are absolutely fantastic. They do justice with all types of music especially complex classicals and rock. Then again, the source and amp was all Ayre acoustics.  I don't think it's the speakers.  Tell us what components your using and the type of speaker wires. 

I understand the OP’s point - but I’d say it’s really only valid in the context of overall high end speaker designs.

The Vandy 2 and 3 series are not goosed through the presence region and can sound less dynamic to those used to the many, many high end speakers that are. They also both feature a gently falling overall FR, desirable IMO for natural sounding tonality in most rooms. Both speakers (The 2, in particular, IMO) work amazingly well on their own terms, but neither is perfect in every respect. IME, no speaker is going to satisfy every listener on every recording, and the 2 and 3 are designed to the relative strengths the OP identified at the expense of the relative weaknesses the OP identified. Just MHO, but for me:

The net result is that the 2 and 3 virtually always sound great with smaller scale music, but may feel less satisfying on "bigger" music.