I have thoroughly enjoyed my time with the Air Tight 211 amplifiers. The $9995/pair 211s have more than enough juice to drive sensibly-chosen speakers and, while by no means inexpensive, are not overpriced for the sound they deliver. Their refined, smooth, extended, dimensional, and dynamically authoritative presentation make them a very attractive choice for someone looking to assemble a superior SET-based system that will not suffer from most of the limitations of the Air Tight's lower-powered brethren.