I'm giving 5 stars because I have not heard higher end monitors above this price point in my life, so I can only compare B2031A with B2030A which I also own.
When putting both aside on a A/B comparison, the result is unbelievable!!
The B2030A sounds canned and strange!
I've not read on the internet this kind of differences between the two, but they are surely different, and B2031A sounds much much better, surely worth the difference in value.
I've tested the all 4 speaks on all, so if it a problem with my B2030A, it is the same with both...
Choose wisely!