I haven't heard neither the 14BSST nor the 14B3 but my brother's 7BSST monos were simply transformed when he switched from the BP25 to an ARC REF5SE. His Magnepan 3.7i speakers never sounded so good. Just one (more) data point for whatever its worth.
Bryston preamps
Bryston is renowned for their amps obviously. I have a BP 25 into a 14b3 but have a chance to upgrade now to a BP 26 or 17. Should I instead invest in a tube preamp (5k budget) or stick with bryston for synergy. Audio Advisor has Parasound and Vincent. A forum post I read about the Para sound said it might sound to lean With the bryston. I'm looking to buy new this time around. Thanks for any input. Huh there is the George Lightspeed to ponder.