I use OPPO 105 DVD in my "2 channel system" because it streams most sources; I have 4Tb outboard hard drive with WAV, FLAC and MP3 files; works great. Also recognizes jump drive for temp listening.
For my gear, I'm Emotiva; great value. This Surround Pre is getting great reviews and has "room correction".
https://emotiva.com/products/pres-and-pros/xmc-1
For gobs of power, use the XPR-2 on the mains w the XPR-5 on the other channels. Or the XPR-7 if you're budget limited.
My speakers are "matched" Paradigm. The benefit is timbre and efficiency matching that you don't get by "mix & match".
I believe the Emotiva value is unsurpassed and check out the reviews!