If you are planning biamping with PrimaLuna, also consider Hegel 600. It has amazing base control it can improve base tremendously. Also former version Hegel 590 is about 6K for used. I use them for my Sasha DAW, and I love that amp.
Solid State Power Amps
I’m currently using 2 PrimaLuna EVO 400 power amps. I want to try my EVO 400 preamp with solid state power amps. I am considering the BHK 300, MC830, Accuphase 250 or 300 and the Pass X260.8. My budget is around 25k. Any thoughts or suggestions would be appreciated. If there is something else please recommend it.