It appears that both your current speakers and most of your future choices would call for a push-pull tube amp. No SET or even 300B tube amp would probably drive these speakers in a moderately to large room.
That being said, of your two choices, I would choose the McIntosh MC275 amp. Any future reco's would depend on your speaker choice. Of you speaker choices, I cannot claim to have heard them all, but I was very impressed with a pair of Dynaudio S3.4's that a friend of mine owns. As always, YMMV.
Cheers,
John
That being said, of your two choices, I would choose the McIntosh MC275 amp. Any future reco's would depend on your speaker choice. Of you speaker choices, I cannot claim to have heard them all, but I was very impressed with a pair of Dynaudio S3.4's that a friend of mine owns. As always, YMMV.
Cheers,
John