I have a very similar setup - McIntosh C2600 Tube Preamp, McIntosh MC452 amp and Martin Logan Montis speakers. I am in heaven when I am in my listening room listening to well recorded music. I hear the same 3 dimensional sound stage that you describe. I have been in many audiophile stores listening to their $200K setups and I have yet to find a better soundstage than mine (though I am sure many, many others make my sound like introductory system!).
Two very important points on the ML speakers:
1. They are extremely sensitive to tiny changes in setup. I spent weeks and weeks optimizing the exact location of each speaker. It's funny - I came home one day after the cleaning lady had been here and I noticed she moved one of the speakers to clean - I have now marked the exact location of each of the 4 spikes on both speakers.
2. These speakers must be moved away from the rear wall. I have mine at 3' and this makes a huge difference. The extra distance eliminates that smeared image that you get when the sound comes off the rear of the speaker and then bounces off the rear wall and comes at you slightly delayed behind the main wave coming off the front of the speaker.
I have spent time making acoustic improvements in the room and these changes also provided additional sound stage improvements.
I love your writeup - enjoy! (For the record, I am 1000% happy and satisfied with my setup and have no idea what I would do to make it better.)
Two very important points on the ML speakers:
1. They are extremely sensitive to tiny changes in setup. I spent weeks and weeks optimizing the exact location of each speaker. It's funny - I came home one day after the cleaning lady had been here and I noticed she moved one of the speakers to clean - I have now marked the exact location of each of the 4 spikes on both speakers.
2. These speakers must be moved away from the rear wall. I have mine at 3' and this makes a huge difference. The extra distance eliminates that smeared image that you get when the sound comes off the rear of the speaker and then bounces off the rear wall and comes at you slightly delayed behind the main wave coming off the front of the speaker.
I have spent time making acoustic improvements in the room and these changes also provided additional sound stage improvements.
I love your writeup - enjoy! (For the record, I am 1000% happy and satisfied with my setup and have no idea what I would do to make it better.)