I think we need to spend more time on the Atma-Sphere MA-2 Class A, 220 watt, OTL amplifier.
http://www.atma-sphere.com/Products/#MA-2
http://www.theaudiobeat.com/equipment/atma_sphere_ma2_mk31.htm
http://www.atma-sphere.com/Reviews/tas/workshop/index.html
http://www.soundstage.com/revequip/atmasphere_ma2ii3.htm
http://www.soundstage.com/revequip/atmasphere_ma2iii_followup.htm
From these reports and WBF members' reports there seems to be a consensus that these amplifiers, like other OTL amps, are capable of amazing transparency, but, unlike other OTL amps, you can get these in 220 watt and 500 watt versions.
http://www.atma-sphere.com/Products/#MA-2
http://www.theaudiobeat.com/equipment/atma_sphere_ma2_mk31.htm
http://www.atma-sphere.com/Reviews/tas/workshop/index.html
http://www.soundstage.com/revequip/atmasphere_ma2ii3.htm
http://www.soundstage.com/revequip/atmasphere_ma2iii_followup.htm
From these reports and WBF members' reports there seems to be a consensus that these amplifiers, like other OTL amps, are capable of amazing transparency, but, unlike other OTL amps, you can get these in 220 watt and 500 watt versions.