I agree with @mclinnguy that it’s difficult to answer your question for the reasons stated, but IMO, the most seamless way to start is to upgrade your digital source. I’ve owned the Oppo 205 and I think that any $1000+ dac will be quite an upgrade. You can use the Oppo as a transport for starters. You can still play SACDs directly from the Oppo, but I think that Redbook through the dac will sound better than SACDs through the Oppo. As to what dac to buy, there are tons of threads here on that. Check out the dac shootout thread by Verdant. Whether you want to get into streaming is another issue. I personally do not stream, so I’m not going to opine in the merits of streaming. But I do think your source is currently your best path for an upgrade. The Oppo is a great jack of all trades, but, IMO, the sound cannot compare to a good dac. Be well .
What should I upgrade next in my system?
Would a music streamer be the best place to spend money?
(2) MartinLogan Renaissance ESL 15A electrostatic speakers for front channels.
https://www.audioadvice.com/renaissance-esl-15a-speaker
https://www.martinlogan.com/en/product/renaissance-esl-15a
https://www.youtube.com/watch?v=00vU9u-mAgc&t=1027s
(1) MartinLogan Illusion ESL C34A Center Channel Electrostatic Speaker
https://www.martinlogan.com/en/product/illusion-esl-c34a
(2) REL Carbon Special Subwoofers set up to run stereo.
https://rel.net/wp-content/uploads/2020/08/REL_Carbon_SPECIAL_Manual_04-20-Web.pdf
Sony - VPL-XW5000ES 4K SXRD Laser Projector 5995
https://helpguide.sony.net/vpl/xw5000/v1/en/contents/TP1000557903.html
Anthem AVM 60 11.2 Channel Preamplifier and Processor. 2995
https://www.anthemav.com/downloads/avm-mrx-english-manual.pdf
Mark Levinson Number 532H Power Amplifier for front two channels (300 watts x 2 channels)
https://www.stereophile.com/content/mark-levinson-no532h-power-amplifier
Krell KAV-3250 Amplifier for center channel and back two channels (250 watts x 3 channels). 6000
https://www.krellhifi.com/wp-content/uploads/2020/04/Krell_KAV2250_3250_Owners_Reference.pdf
Oppo UDP-203 Blu-ray Player
https://www.oppodigital.com/blu-ray-udp-203/
Screen Innovations 120” Fixed Projection Screen
https://www.crutchfield.com/p_9543F120SG/Screen-Innovations-3-Series-120.html?tp=166
Savant Pro Remote X2
https://www.savant.com/pro-remote-x2
Netgear NightHawk X4S Model C7800 AC3200 WiFi Cable Modem Router
https://www.netgear.com/home/wifi/modem-routers/c7800/
Cox Contour Cable Box (1) in the rack in the equipment closet for Media Room and (1) on the closet shelf for the (2) outdoor TV’s
https://www.cox.com/residential/tv/learn/learn-about-contour2.html
Panamax M5300-PM Power Conditioner/Filter
https://www.panamax.com/product/max-5300-power-management-2ru-11-outlets/
Lutron Caseta Wireless Light System L-BDGPRO2
https://www.casetawireless.com/proproducts
Headphones:
Focal Clear Mg Open-Back Headphones with 55 Ohms Sensitivity 104dB SPL / 1mW @ 1kHzTHD0,25% @ 1kHz / 100dB SPL Frequency response5Hz-28kHzLoudspeaker1.6" (40mm) Aluminum/Magnesium 'M'-shape dome
https://www.focal.com/headphones/pdf/clear_specification-sheet.pdf
Sennheiser HD800S-Reference closed back Headphones
https://en-us.sennheiser.com/high-resolution-headphones-3d-audio-hd-800-s
Sennheiser HDVD800-Headphone Amp
https://en-us.sennheiser.com/headphone-audio-amplification-hdvd-800-acoustic
Sennheiser Momentum 3 Wireless Headphones
Sennheiser Momentum 1 Wireless Headphones
Master & Dynamic MW65 Active Noise-Cancelling (Anc) Wireless Headphones - Bluetooth Over-Ear Headphones with Mic, Silver Metal/ Brown Leather
Apple Pro Earbuds
https://www.apple.com/shop/product/MWP22AM/A/airpods-pro
Rick Guild
918-645-3677