would I get better performance if I were to invest into a dedicated streamer, DAC, and SACD/CD player?
Absolutely! Plus, as both technologies continue to evolve at a rapid rate, why would you wanna be stuck with one if/when the other has a breakthrough you’d like to have. I’d recommend an iFi Stream with upgraded power supply and then choose the DAC that best exhibits the sound qualities you’re looking for. Also, an optical interface between your router and streamer would also be a significant upgrade and can be done for only $80, but that’s a subject for another thread. Bottom line — GO SEPARATES WITH DIGITAL. FWIW, and best of luck.