Frank you might be surprised if you did some homework on what's available in multich today.Precisly this, and this is why I have stuck with stereo rather than multi channel - my favourite recordings are stereo so all the benefits of spatial accuracy of multi channel don't apply to them
I'm not a classical person but I recently took advantage of a Berliner Philharmoniker free 7 day offer to check out the offerings.
They are streaming some amazing music from live concert events much in some awesome multich sound.
Concerts | Digital Concert Hall
The Digital Concert Hall archive contains over 700 video recordings of Berliner Philharmoniker concerts. The search categories help you find the content of your choice.
www.digitalconcerthall.com
It's not a matter of money for you, expand your horizons by adding multich capability to your current system.
You won't be disappointed.