I can't speak for the Nighthawk or Osprey as I have the Raven Integrated Reflection MK2. I can tell you that it is outstanding. Mine delivers close to 73 wpc and drives my Sonus Faber Speakers like a symphony. Dave Thomson is a super guy who has some of the best tubes out there. He also totally stands behind his product. I am hoping he can build me a 100 wpc amp later in the year. You will be super happy if you decide on Raven.
Raven Audio/nighthawk or Osprey
I recently purchased a Microzolt MZ2 as a pre-amp and had a Schiit Vidar amp connected. After a few hrs. The Vidar started blinking, after trouble shooting the Vidar indicated it was High D/C offset. LTA took the MZ 2 back but said it wasnt their equipment and offered to refund me the money (which i did). Now im looking for another pre-amp but this time i may just go with an integrated amp/preamp. Anyone have suggestions or have experience with Raven Audios Nighthawk or Osprey?