Recent review for the Bryston 3B.
Even though your Dunlavy’s are efficient you still need some muscle to get the bottom end and fullness. Owned a pair Dunlavy’s way back in the day and just were not for me, that being said I would stay with an amp more on the warm side than cool. I think I’d hands down go with the BHK 250 with a nice high current power cord which you probably already own. I would think what you get out of your Krell’s will get you the PS Audio. Not sure how they would work with you on a trade allowance but worth an email with them. I bet they will work with you. Shipping on your Krell’s maybe an issue but maybe they have a means to make it happen. Good luck.