New Audio Frontiers 211 SE amp opinions and experience

An opportunity has come up to get my hands on a New Audio Frontiers 211SE (stereo version). Wondering if anyone has any experience with them? Not too much press state-side but plenty in Europe. I've had Art Audio Carissa 845 that performed very well with my Harbeth SHL5s and Zu Essence but eventually lost out to 2a3 and 45 amp with my Klipsch LaScala. The rest of the system are: LP12/Origin Live/Lyra MC, Esoteric SA50, David Berning ZOTL PreOne, and Chord, Crystal Cable and Nordost cables. I have as mainstays Alan Eaton 2a3, Paul Birkeland 3C24, and LTA Ultralinear, but crave a more balsy (for lack of a better word) presentation or slam from time to time. As always, positive opinions and constructive criticisms are greatly appreciated.