If all you're using the Oppo for is the DAC and your budget is around $1000, you could definitely upgrade sound quality. I have owned Oppo 103, 203, 105D, and HA-1. I still have the 105D in my bedroom system, but rarely use it. I use the DAC in my Sony headphone amp in that system, which is much better than the DAC in the Oppo and I have a Bluesound Node 2 streaming into the Sony, giving me a lot more streaming options than the Oppo does.
You might consider using the computer in your office to stream Tidal to a DAC via USB. Setting up your system this way would give you access to other streaming services like Qobuz, Radio Paradise, etc.
The MHDT Orchid is in your price range, but does not do MQA (neither does the Oppo) if that matters to you. I've found that it doesn't matter to me, but I know some want MQA. There are other options in that price range and I'm sure you'll get some other recommendations.
You might consider using the computer in your office to stream Tidal to a DAC via USB. Setting up your system this way would give you access to other streaming services like Qobuz, Radio Paradise, etc.
The MHDT Orchid is in your price range, but does not do MQA (neither does the Oppo) if that matters to you. I've found that it doesn't matter to me, but I know some want MQA. There are other options in that price range and I'm sure you'll get some other recommendations.