I'm not familiar with your speakers, but judging from the specs, I don't think you have enough power. They may play "loud enough" but you're not really hearing what the speakers can do, even at lower listening levels. Also, you've got single-ended amps which won't give you the bandwidth that a push-pull tube or SS amps will. I'd shoot for at least 40 wpc, or if you insist on lower power, get something that has some decent low-end response.
Anyone else constantly curious about amps?
I'll start of by saying I have a really great sounding amp, the Mastersound Dueventi. It's a class-A tube amp running in PSET putting out 20 watts of power, which proves to be plenty in my room. I have other audio upgrades that would be more valuable. I've slowly been replacing cables, a new streamer would probably have the biggest impact in my system next, I'd like a new turntable now that I've stepped up my cartridge and phonostage...
But I just keep coming back to amps. For some reason I just feel a need to bring in something new. I can't afford it. It won't be the most high impact in my system. I don't really have anywhere to demo several of these options. But still, I've been on a two week long rabbit hole exploring solid state class A options like Pass and Sugden. I heard a top in system this past weekend with Jeff Rowland driving the system and I forgot how great those can sound, so I'm finding myself looking at their integrated. I know Norma amps sound amazing with my speakers, so I'm always tempted to bump that up the priority list.
Someone talk me off the ledge and help me with this sickness!