"Thinking about taking the plunge into the tube arena to soften up the highs in my 803S speakers."
The only thing I would suggest is to be aware that you have 2 different goals here. One goal is to try tube gear, and the other is to fix the highs on your B&W's. While you may get lucky, I wouldn't expect a move to tubes to fix the issue with the speakers. Those 2 goals should be dealt with separately.
The only thing I would suggest is to be aware that you have 2 different goals here. One goal is to try tube gear, and the other is to fix the highs on your B&W's. While you may get lucky, I wouldn't expect a move to tubes to fix the issue with the speakers. Those 2 goals should be dealt with separately.