You will get different sonic characteristics depending on the amplifier and the type of tubes you are running. KT88/99 (Sonic Frontiers SFS-80/SFM) type tubes have a warm, but less detailed sound. Amp designs using 6550 (Audio Research vt100) are more detailed, but less warm. Single Ended amps (I've never heard one) are supposed to have a tremendous imaging capability. I've heard some tube amps (new sonic frontiers power 2) that don't have enough tube warmth for my tastes.
Advice from tube "lovers"...
...this is kind of continuation from my earlier post SS/ESL vs Tube/dynamic...i expected more of the "input"...but what i "gather" from few responses is definitely: TUBE! But which design and with what kind of tube you have had, best results? SE with KT88, El36, 300B or...? Or PP with KT88, EL36...etc! I know question does cover a lot, but ANY suggestion will be greatly appreciated!