Well, first of all, what Robbob posted makes sense. It explains why Def Tech speakers get great pro reviews and mediocre user reviews - they are very sensitive to associated gear. That's not knocking them, btw, some of the best speakers made are sensitive to the electronics they are connected to.
I don't think you can compare the Studio 20s to the STS towers - apples and oranges. Instead, I would want to compare the STS towers with a similarly priced Paradigm tower. Of course, the Paradigm would not have powered subs built in, but it would be a better comparison.
The STS tries to do it all - music, movies, full range, big dynamic capabilities, etc. I don't doubt you get a lot for your $3K. But, a monitor like the Studio 20 has a completely different design goal. The focus on these speakers is usually moderate output capability, excellent imaging and sound stage, clarity and definition in all but the lowest octave or octave and a half. If you want a fair comparison, get ahold of Def Tech's best monitor and compare that to the Studio 20s.
More of my $0.02.
I don't think you can compare the Studio 20s to the STS towers - apples and oranges. Instead, I would want to compare the STS towers with a similarly priced Paradigm tower. Of course, the Paradigm would not have powered subs built in, but it would be a better comparison.
The STS tries to do it all - music, movies, full range, big dynamic capabilities, etc. I don't doubt you get a lot for your $3K. But, a monitor like the Studio 20 has a completely different design goal. The focus on these speakers is usually moderate output capability, excellent imaging and sound stage, clarity and definition in all but the lowest octave or octave and a half. If you want a fair comparison, get ahold of Def Tech's best monitor and compare that to the Studio 20s.
More of my $0.02.