Had a raven blackhawk, loved the sound, ultimately lacked the power i needed in my room, also came with NOS svet winged Cs and amperex / mullard small signal tubes which helped tremendously.
went with a Rogue Cronus Magnum II and loved it. more power from the KT 120s, did some inexpensive NOS small signal tubes and the sound came close to the Raven but with much more power.
Fast forward and i have gone through multiple pre amps and power amp currently running $12K worth of tube preamp ss power amp and could / should have stopped at the Rogue CM II. The new CM III is even better. One of the best sounding amps in home audio.