Then stick with the 150X with which your pre was designed around. Mixing and matching pre's and powers from both ranges a generations is not always predictable and often leads to disappointment. Tried and tested combinations are the ones that generally offer long term satisfaction, and then there is personal preferences amongst them, like my dislike for the 200 and admiration for the little 150X.
I have a lot of dynamics with my combo, 122x 150x perhaps with a Flatcap or Teddycap is better?
I have a lot of dynamics with my combo, 122x 150x perhaps with a Flatcap or Teddycap is better?
If your speakers are an easy load, I would have thought there were other ways of improving things (should you feel that is necessary) before going near the power amp.