@hifinubee based on your recent posts you seem willing to go in a different direction with the amplifier. I take it that means, given the choice, you prefer to keep the B&W loudspeakers?
SETs appeal to a lot of people. They often then start a quest to chase down a sympathetic loudspeaker to mate with them. I understand you really like the B&W, but I think it's easier to find a loudspeaker that works for you than another type of tube amplifier. If you do want a warm sound in a more powerful tube amplifier you may want to consider some of the BAT, Cary, Conrad Johnson, Jadis, and Quicksilver push-pull offerings. That said, in going there you likely give up what draws you to your current SET amplifier.
Coincidentally, I was the North American importer for Consonance. Just to clarify, the Reference 5.5 used only 2 X 300B per channel, and as its not at all a powerful amplifier, would not much more than you already have. If you want to go in the PSE direction, I recommend the Cyber 300B PSE monoblocks as a much better alternative, but still won't meet your current needs, as they are also seriously deficient in the low-end. Consonance also produced 211 (great midrange, not much low-end) and 845 (good low-end, overly dark and veiled midrange) versions of the Cyber monoblocks, which work best with back-loaded horn loudspeakers. As I previously stated, neither of those larger tubes produce what people like so much about 300B amplifiers. SETs have ridden this popularity wave for more than 20 years, and with it, the larger tubes. So many people have found themselves in the same situation as you, loving the lower wattage amplifiers, but wishing for more output to adequately drive their loudspeakers. If the larger SETs represented the solution, they would have already caught on in a big way. As things are, the 300B handily outsells them, for good reason. To provide acceptable power and bass response, you may also want to consider push-pull triode amplifiers, using 300B, or even better, 2A3 tubes
SETs appeal to a lot of people. They often then start a quest to chase down a sympathetic loudspeaker to mate with them. I understand you really like the B&W, but I think it's easier to find a loudspeaker that works for you than another type of tube amplifier. If you do want a warm sound in a more powerful tube amplifier you may want to consider some of the BAT, Cary, Conrad Johnson, Jadis, and Quicksilver push-pull offerings. That said, in going there you likely give up what draws you to your current SET amplifier.
Coincidentally, I was the North American importer for Consonance. Just to clarify, the Reference 5.5 used only 2 X 300B per channel, and as its not at all a powerful amplifier, would not much more than you already have. If you want to go in the PSE direction, I recommend the Cyber 300B PSE monoblocks as a much better alternative, but still won't meet your current needs, as they are also seriously deficient in the low-end. Consonance also produced 211 (great midrange, not much low-end) and 845 (good low-end, overly dark and veiled midrange) versions of the Cyber monoblocks, which work best with back-loaded horn loudspeakers. As I previously stated, neither of those larger tubes produce what people like so much about 300B amplifiers. SETs have ridden this popularity wave for more than 20 years, and with it, the larger tubes. So many people have found themselves in the same situation as you, loving the lower wattage amplifiers, but wishing for more output to adequately drive their loudspeakers. If the larger SETs represented the solution, they would have already caught on in a big way. As things are, the 300B handily outsells them, for good reason. To provide acceptable power and bass response, you may also want to consider push-pull triode amplifiers, using 300B, or even better, 2A3 tubes