MBL isn't the only manuracturer who gives these characteristic high priority.
Yes this wide even dispersion charateristic was demonstrated by Dr. Floyd Toole in listening tests in the 70's as sounding most pleasing, natural and life-like convincing.
MBL's will work well placed well out into a room. They won't work as well up against a wall because of the strong rear radiation - so be careful about placing them in a small room without treatments -if you have the space then these are a great choice. There are a great many good conventional speakers with wide dispersion although sadily most two ways will "beam" in the upper midrange and therefore fail to sound convincing there you can somewhat overcome this by listening in a close near-field position).
Revel Studio 2 and Dynaudio Sapphire lare extremely good. Kharma's and other speakers with the accution mids and Dunlavy's Iv and V's are also worth checking out.
My guess is that "dynamics' may have something to do with your observations too. Real instrunents are actually very loud but they don't sound loud.
Good Luck in your search.