As you have learned, it can be unwise to make such a leap of faith based upon what you currently own. Krelldog is correct about breaking them in, although that's no guarantee you will change your mind, so you might want to explore other speakers. Once you've owned dipoles, it can be very hard to go back to box speakers unless the former have glaring faults. You're surely not lacking power with the Levinson 436s which are pretty nice amps, leaving you with plenty of options. It might help to describe your room, listening preferences and what you like and are looking to improve in your current setup.
Brian
Brian