I like the high end Yamaha amps. I use 3 Yamaha M80s which run 30 watts per channel in pure Class A (8 ohms), and then from 30 to to 250 wpc (continuous 20-20KHz) in AB. (dynamic 1KHz/8ohms 380 wpc) I think it's very rare that I exceed 30 wpc even with the Thiels. The Axioms are even more efficient.

I haven't heard the 830 but those who have love it. Let us know how you like it.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.