If you can swing the 509X that would be wonderful, but you’re still going to need a streamer. So I have about 2500 CD’s either on a shelf or on a NAS and I just bought my first streamer this year ( a Node N130 ) to see what everyone was talking about. I quickly became hooked and upgraded both my connection and the power supply on the Node and am not sure I’m going to change my streamer for a good while as it also sees my Nas, so I can seamlessly listen to all the tunes I have on there. I’m very pleased with the sound. I am still going to try all of the services Qobuz Tidal Amazon etc.
I’d suggest getting an open box Node ( I paid $500 instead of $600 ) start there. It has a DAC that a lot of people like and you already know the software. As time past, I did buy a separate DAC, but it also made a difference on my CD’s.