I had Eggleston Andra II's (upgraded from I's). a very forgiving speaker IMHO.
The JM Lab speaker is made to an even higher build quality, but it "may" have more issues in getting the optimum set-up. also, you are comparing the esotar tweeter from dynaudio, a silk dome with uncommonly good reviews, with the beryllium tweeter in the Nova, which is super-high-tech. my "guess" is that the Nova is the better deal, while the Andra sounds utterly natural on piano, strings, and you can place it in a number of locations in a wide variety of rooms. i did hear a JM lab mezzo-utopia years ago and was very impressed, but the Nova-BE is a different speaker altogether, one i never got to hear personally. one other factor might be the BASS extension- the Egg's go below 20Hz with ease. some early reviews of JM Lab speakers mention less-than-adequate VERY-LOW bass extension. If you listen to pipe organ music a great deal this is another factor to consider.
The JM Lab speaker is made to an even higher build quality, but it "may" have more issues in getting the optimum set-up. also, you are comparing the esotar tweeter from dynaudio, a silk dome with uncommonly good reviews, with the beryllium tweeter in the Nova, which is super-high-tech. my "guess" is that the Nova is the better deal, while the Andra sounds utterly natural on piano, strings, and you can place it in a number of locations in a wide variety of rooms. i did hear a JM lab mezzo-utopia years ago and was very impressed, but the Nova-BE is a different speaker altogether, one i never got to hear personally. one other factor might be the BASS extension- the Egg's go below 20Hz with ease. some early reviews of JM Lab speakers mention less-than-adequate VERY-LOW bass extension. If you listen to pipe organ music a great deal this is another factor to consider.