They get happier with more power, especially the tweets and domes, there are so many of them! I think that they are 82dB speakers too.
I really like the way female vocals and acoustic music sound on them, hard rock not so much, they are pretty laid back and "accurate". The rock exception is the good ol' Grateful Dead, try any of their multi tracked live recordings, "Three from the Vault" and Europe '72 sound awesome, as does Spring '90 and especially "Nightfall of Diamonds"!
They are really sensitive to set up, so play with all the controls, move them around the room, and switch gear often. I found that it was pretty tricky to get the most out of them but all the time I've put in to it has really paid me back!
Looking forward to hearing your reactions...