I have the Sierra LXs and ran right to my listening room to see how wide the “clicks” he mentioned in Magic were. Although not a couple of feet outside of the left speaker, it was definitely outside. My listening position is close probably affecting the soundstage.
You couldn’t do much better than a hypex or purfi amp from Audiophonics paired with a MiniDSP SHD Studio and one of the many Topping DACs reviewed here.
Seriously!