Mp is right. Give your Logans a listen with both solid state and high powered tube amps and hear the difference for yourself. They really open up with tubes. Tube amps are also better able to deal with the sometimes interesting impedance swings that these speakers can produce.
By the way, you didn't mention which Martin Logan speakers you plan on using. Are you driving Statements, Prodigy's, CLS's, etc. -- it will make a difference in recommendations although conceptually I think tubes, (or a combination of tubes and solid state), are still the way to go whatever the model.
By the way, you didn't mention which Martin Logan speakers you plan on using. Are you driving Statements, Prodigy's, CLS's, etc. -- it will make a difference in recommendations although conceptually I think tubes, (or a combination of tubes and solid state), are still the way to go whatever the model.