Another vote here for sufficient power. I have the VZN-80 and a pair of Merlin VSM-Ms in a room about 15 ft by 22 ft. For realistic listening to all kinds of music (including Led Zep) I rarely crank my preamp past the 12'oclock mark. The Joule's are not the last word in power for sure but any sane person would do fine with them for 99.9% of their listening.
