Pass Aleph 0 or Mark Levinson ML29 for Wilson Watt/Puppy 5.1?

Hi all, Now I have a ML29 driving my Wilson Watt/Puppy 5.1 in a small room of 13mq  (square meters), and I've buyed a pair of Aleph 0.What should I expect? 
Someone told me that a Single Ended (as the Aleph are) is not suited for driving the hard impedance of the W/P, but one of the reasons I've bought the monos is that they were used to drive the W/P 5.1 in the famous review of Stereophile. 
The other reasons are a need of a mejor transparency and quality overall of the highs. It seemed to me that the ML29 sometimes lack in this area.... 

What are your thoughts and/or your experiences about it? 

thank you!!!

- Alex