Quintessence Shadow or Grand Veena

Hi, recently I've ask about Duntech Sovereign or Grand Veena. After I listened to the Sovereign extensively, I decided to let it go because mid to high from them is not as good, detailed as Grand Veena to my ears. And now I have found a used pair of Quintessence Acoustics Shadow. Then I search for information but I couldn't find much about them. So I just want all of your opinion about the Shadow compared to Grand Veena. Is it worth to get these speakers.

And other thing, my amp is ASR Emitter II exclusive. And I have a fairly large room about 20x40x8.5 ft, this is why I want to find bigger speaker than Grand Veena.