Lovely system, I heard the Peak consult speakers before I bought mu Acoustic Zen speakers,they were too costly for me. You have some great suggestions, particularly the Pass XA series. They were designed to give the tube like magic of the Aleph amps with the greater power of the X series. I tend to like a tube pre with SS power amps, so a hybrid might be a good choice. The Canadian DK or LSA as it is now, hybrid integrated amps sounded very good and reasonably priced, when I heard it at a recent show. 150watts should be more than enough.