I owned a Raven Blackhawk and currently run an LM508IA. I can tell you there is something really special about vocals with the Blackhawk and the speed of the push/pull configuration was apparent. Your 87dB speakers may require the Osprey if you like to play loud.
The LM508 ticked all the boxes for me - clarity, life like timber and tonal color. The bass is authoritative without the SS/Class D overdamped edge. Stand up bass in jazz trios pops naturally. We have similar music tastes and the LM508 delivers, a truly great rock/jazz/vocal integrated. 48W of class A SET amp goodness means you can have your cake and eat it too.
The LM508 ticked all the boxes for me - clarity, life like timber and tonal color. The bass is authoritative without the SS/Class D overdamped edge. Stand up bass in jazz trios pops naturally. We have similar music tastes and the LM508 delivers, a truly great rock/jazz/vocal integrated. 48W of class A SET amp goodness means you can have your cake and eat it too.