I had a Bryston 3B-ST and a 4B-ST and they were a little hard on top. I would not like it paired with my current 3.7. I also had a 7B-SST and even that was a little strong on top and I would not pair it with the 3.7. I did pair the 7B-SST with the SCS4 and it was a little too bright on top. I believe the SCS4 and the 3.7 has similar COAX drivers (maybe not the same). I get fatigued easily so others may not have a problem with the ST or SST.
If you wait a few more months the Purifi modules with 1000 watts into 2 Ohm should be released by Bruno et al. The goal of these Class D amps is to remove a 0 from the price of amps. It should be a great match with the 3.7. The NAD M33, which was Stereophile's 2020 product of the year, has the first iteration of the Purifi module.
Other manufacturers are pumping out quality Purifi amps for $3K and under price. I am waiting on the next more powerful Purifi amp for my 3.7's. They are supposed to sound like my great Benchmark AHB2 amp.
If you wait a few more months the Purifi modules with 1000 watts into 2 Ohm should be released by Bruno et al. The goal of these Class D amps is to remove a 0 from the price of amps. It should be a great match with the 3.7. The NAD M33, which was Stereophile's 2020 product of the year, has the first iteration of the Purifi module.
Other manufacturers are pumping out quality Purifi amps for $3K and under price. I am waiting on the next more powerful Purifi amp for my 3.7's. They are supposed to sound like my great Benchmark AHB2 amp.