Dancub,
I had a lot of Bryston gear in the past, 3B-ST, 4B-ST, PP300, 7B-SST, and BP-25 (pre-amp) that are all sold now due to downsizing. I never heard the B60 though I think it is supposed to be smoother sounding that anything I have listed above.
At one time I also had the Thiel SCS4 with the PP300 (essentially a 4B-SST) and it was pretty good. Not as good in near field as the KEF LS50, but pretty good for it’s price in a larger room. Heck I like my KEF LS50 over my prior Revel Salon 1 ($20K speaker) driven by 7B-SST (of course comparison is near-field only). I am also using a very cheap Parasound A23 amp with the KEF LS50.
If you are not crazy for bass then I would recommend the LS50. I have them on my office desktop (on Isoaccustic stands) and it is such an nice monitor for near-field. I will never sell these speakers and will pass them to the next room in the house as I get bigger speakers..
The reason I want to try the Benchmark over the Parasound is that the Parasound is dying and needs replacement. The Benchmark is touted as being measured as the quietest amp in any price range.