Start out with a WIIM Pro outputting to external DAC, or if you are into fiddling with configurations, try a Raspberry 4 or higher with HAT for sp/dif output.
Then if you want to consider spending a ton more money, try more expensive streamers from a dealer with a good return policy, and A/B the streamers.
I bet a paycheck you could never hear a difference between the streamers unless you compare one with DSP vs. no DSP.