I have the Nuforce STA200 ( class AB) matched to my BHK pre. Zu Omen def speakers. The Nuforce sounds wonderful but has a huge amount of gain (35 dB). I have a passive pre in the feed going into the STA200 to lower the tube hiss. With super sensitive speakers, I really need to match carefully. The BHK 250 is currently out of my reach and will be even more once PSA goes direct. I would like to eliminate the passive pre to clean my rack up a bit. Plus I can use my balanced connections.
Then a couple years later once we get some remodeling completed, I can revisit an amp purchase