I have almost exclusively used SS amps with my Omegas and almost exclusively Pass and First Watt. I really enjoy the balance of neutrality, tone, and naturalness that Nelson imparts in his designs. As many here know, I've tried most of the First Watt offerings (flavors?), as well as all the "low" power Pass amps since the XA30.5. I currently have an XA25, which I'm enjoying immensely and have an F3 on standby. I generally agree with the earlier statement that First Watt amps are made for single driver / high efficiency speakers, some moreso than others. I'll say that I find the single ended Pass / First Watt designs to sound better than the push-pull designs with Omegas. Note that the XA30.5 and XA30.8 run in single ended class A for their first watt or two...which is quite a bit of power for Omegas. Not only are Omegas highly efficient electrically, they're also mechanically easy (because the cones are so light and they're coupled to such strong motors).