Before you swap out your preamp/amp, you might consider trying a different DAC. I had a W4S DAC2 for a couple years and wasn't really happy with it (I had MG3.6r at the time). I thought my two-decade-old Levinson 39 CD player used as a DAC sounded better (granted, this was higher $$$ even though fairly old). I bought a Schiit Yggdrasil which I liked MUCH better than the W4S.
I'm now using a Denafrips Terminator with the Parasound JC-2 BP and JC-5 and think it sounds quite good, but of course it's all about system synergy.
Bryston gear is excellent as well (I have a couple of components), and if that works better in your system, go for it. I'm sure you'll be able to get a good price for your JC-1s as they are very highly regarded.
I'm now using a Denafrips Terminator with the Parasound JC-2 BP and JC-5 and think it sounds quite good, but of course it's all about system synergy.
Bryston gear is excellent as well (I have a couple of components), and if that works better in your system, go for it. I'm sure you'll be able to get a good price for your JC-1s as they are very highly regarded.