Moving up from an Oppo 205

IMHO there’s one clear choice AT ANY PRICE provided you’ve got a budget of at least 5-6k. The PS Audio DirectStream DAC is the cats meow. And enjoy free firmware updates for life which the company typically provides once or twice a year. You could spend 20k and not get a better sound. https://www.psaudio.com/directstream-dac/

I use my Oppo BD 105 as transport and HT use, but just added the Exogal Comet plus DAC
for my tube gear setup and Solid state system
I have been considering the Innous streamer/CD ripper, or the Exogal Vortex streamer
I haven't had the Comet DAC n my sytem for very long but from what I've heard so far, its definitely a step up in sound quality! I must say I love everything that the Oppo BD 105 can do

Why are you upgrading? Are u satisfied with your oppo? If you are not, what are u looking for in the new device?
upgrading an Oppo is a hard thing to do.  But you can still use it as a CD player, blu ray player, 4 k player and use a DAC after the Oppo using it’s bitstream feature.
i love NAD and Classe.
i would go with a M32 as a 2 ch integrated amp, that has all the streaming capabilities or with the classe sigma 2200, but u will loose some streaming capabilities.

@vdosc. I’ve had the exact same setup as you. Aurender N100H, Oppo-205 and c2500. I upgraded the DAC to the Bryston BDA-3 and it had a significant improvement. My N100H and Oppo-205 are both connected to it.