Two most memorable systems I've heard were ARC VT200 into big Magnepans and late 80ies Jeff Rowland amps driving Proac Response 3s - both in well treated dealer rooms. As I've never had any truly good rooms myself I've tended to go for smaller systems in nearfield and the Leben CS300 is probably the most musically satisfying amp I've owned (and I have owned 47 Lab, Air Tight, ARC, BAT, Levinson, Rowland...) Owned two CS300s, sold them and regretted it..sure another one will appear again at some point