I just hooked up my Zu Omen MKII's to my Orchard Audio Starkrimson Ultra GaN FeT amplifier. I use Audio Physics classic 20's with the Orchard amp. These are just my thoughts listening for about 20 minutes right now. Preamp is Schiit Freya +. The Zu's are 97db 12 ohm. I usually use my Zu's with the Willsenton R8, 25 watts in triode mode. They sound pretty good so far. Bass is more impactful but not sloppy. Overall, the music has more authority. No problems handling the power of the Starkrimson amplifier. Zu says their speaker can be used with all types of amps, low power or high power. I would probably have to fiddle around with speaker cables to properly tune it 100% to my liking.
Few more minutes gone by. I'm digging it. I'm not an expert but I can say go for it. Whichever brand you decide to go for you should be fine.