I personally think that Brystons would be much improved by a tube preamp although I haven't heard them that way before. I am going to guess at your price range from the equipment you mention. If you want SS but with some liquidity and 3Dness too, I would suggest a Classe preamp like the CP50 or McIntosh C712. If you want tube preamp for sure, check out the BAT VK-3i. I think all of these would compliment a 4BST very well. Good luck! Arthur
