I bought my Heed from Gene and he gave me a very generous trade in on it. Make no mistake the Sugden was a great amp but there are things that the Belles does that the Sugden couldn’t. Dynamics and detail, both in the upper frequencies and bass. It needs significant break in time. It isn’t audio jewelry like the Sugden, either. The A21 was a beautiful amp. Pride of ownership was off the charts...but look at the pic I shared of the Belles innards. Super well built. Design is flawless. Example, the phono stage is dead quiet with volume all the way up. Even with cd playing there is no bleed over, there was with the Sugden. Gene says that the Aria is very close to the sound quality of the 2018 LFD Mistral that costs twice as much. The Aria is a real winner.