IMHO, none of the three amps listed are good match for the 1.6. But if you have to pick one, I will pick the Jadis for it delivers a bit more current than the other two. My second choice will be the BAT. I would avoid Cray.
I don't know why you decided to replace the Bryston. I think it is a better choice than the three tube amps.
I don't know why you decided to replace the Bryston. I think it is a better choice than the three tube amps.