Panels are so room and amp dependent I really do not understand how people walk into a hifi show room and say this is the best speaker because it costs 200ish after listening to none of their own recordings. Yes it is big and transparent.
The best way is time. Just listen to a lot of different recordings on a system to decide whether you like it. After a while, you can average it out in your mind to decide whether you like it or not.
Sure I would have liked to have remembered to bring my own disks, but I didn't. That said I had four days at the show and consequently I had a lot of time to listen to the Alsyvox. I heard a lot of different stuff on them from varying genres. Just no electronica.
What I have just said is the biggest single problem with shows. Quick listens to a track or two, even if you know it, doesn't give you a decent overall picture of the sound.
Quick side note: I didn't hear anything come out of the Aeries Cerat sub-woofers, though they looked connected at the subwoofer end. Where they ever used? What frequency do they cut in?