I too compared both Levinson and Classe and went home with the ML333. I also own a pair of Audio Research Classic 150s. My front end is an Audio Research Ref 2. Recently my local audio club held auditions at different homes. All who listened to both power amp setups preferred the ML333. It's all about the music and quality power amps all have different signatures. Close your eyes enjoy the music and put your preconceived notions and prejudices aside. In reality your decision will probably be made based on the type of music you prefer because in many cases your preference could change as the jazz, classical or rock is auditioned.