I just picked up a Mcintosh 4100 over the weekend. This would be my first introduction to anything Mcintosh. I've been using a Yamaha AS 1200 and Sansui AU 9500. I surprised how much musicality and punch it has compared to the Yamaha amp. The Wharfdales Lintons seem to come alive and suck me into the music which I found the Yamaha never did. The Sansui also has that exciting presence.