Used a 27.5 for several years and sold it to finance moving into SET valve equipment. It was arguably the best solid state amplifier I've ever used except for an original Bedini 25/25; huge power diff though. The 29 is thought to be the best sounding of the trio (23/23.5, 27/27.5, and 29). I've only seen maybe two for sale in the past couple of years for around 1200 bucks.
A keeper for sure.
A keeper for sure.