Tube or SS

Opinions please: For a variety of reasons I decided to declutter and simplify my life and thus sold my turntable, my LP's, my CD's and most of my all valve system - except for the McIntosh 275 amp.   my current set up comprises a Cambridge NQ streamer through balanced connects to the Mac and Harbeth C7 ES-3 speakers.  Now, Harbeth recommend using SS amps and I am considering replacing the Mac with the Cambridge Edge W power amp as the two items are designed to work together.  My dealer won't allow me a home demonstration to allow me to compare the amps without actually purchasing the Cambridge ( would give me a refund if I don't like it )  Before I take this route I would appreciate any comments regarding the suitability of either streamer/amp combination.
Thanks all