I recommend the Philharmonic 2s with a Mackintosh 275 amp. The Phils are the most transparent speaker that I have heard. They could really convince me that the instruments are in front of me on stage. The Philharmonic 3 has a bit more bass but is less efficient which would be a factor in choosing a tube amp. With the Philharmonic 3s you would want to consider getting two tube amps in monoblock form used.
Bob
Bob