I was in the same situation in that I also wanted more power from my 4BST. My speakers were PSB Stratus Gold Is. I went with a Spectron Musician II (500 watts per channel) and could not be happier. Not only did I have more power, the sound quality was far superior. I found the 4BST too bright, unnatural sounding and less detailed in comparison. I have since upgraded my speakers to Silverline LaFolias and the Spectron is a perfect fit.
Unlike Bryston, Spectron had some prior production problems which gave them some bad press. I have had mine for 8 months and have had no problems. I hear that the newer Spectrons have better quality control. I was willing to trade off built like a tank Bryston, but not nearly as musical, for a Spectron Musician II that didnt have quite the same build quality as my Bryston, but sounded far superior.
Finally, I have no affiliation with Spectron. Im just a very happy customer who would like to share my thoughts. Good Luck! Happy Listening!!
Jim
Unlike Bryston, Spectron had some prior production problems which gave them some bad press. I have had mine for 8 months and have had no problems. I hear that the newer Spectrons have better quality control. I was willing to trade off built like a tank Bryston, but not nearly as musical, for a Spectron Musician II that didnt have quite the same build quality as my Bryston, but sounded far superior.
Finally, I have no affiliation with Spectron. Im just a very happy customer who would like to share my thoughts. Good Luck! Happy Listening!!
Jim