I doubt you will have an improvement, maybe a subtle change. I tried a Jay’s audio cdt2 but there was no improvement over my oppo udp203. Usually the transport has to be good enough, then what matters is the DAC. IMHO, digital sounds mostly the same on all devices: for instance my MSB discrete DAC sounds very similar to my Oppo’s DAC, and I have reference system. If a streamer does not introduce too much jitter, than what matters is the DAC reclock and DAC power supply and its IV conversion more then the DAC chip or technique. Speeding the money on a better streamer? It depends on personal preference: I prefer to play digital discs, SACDs, cds, etc. I would buy a CDT2 or 3 because I like the and I like to use them, I love their top loading system, but I would not fool myself into thinking they are better than my ‘cheap’ Oppo, which can play any format and I can also use it in my home theatre. I also like the Magnetar, but I would use its internal DAC and sell my very expensive DAC. Luxman, Esoteric and Accuphase are the top, but you will have to find them used or avoid the reference models.
Regarding if your Internet connection goes does, you can still stream music from your Roon server if you have digital files. You could start converting your CDs, personally I find it very boring :-)

