I am sorry if you feel I have suggested that you must purchase a W20SE. But, I think you said something about making the best streamer sound great. I assumed you were saying you had a top tier streamer. Well, then to get the most out of it you need a top quality DAC… and preamp, and amp.
None, of this stuff is absolute. I have owned $1K streamers and $1K DACs… and $3K, $5K, $10K etc. This is not a yes or no thing. You get closer to what you want by careful choice and greater investment. So, the take away should be an individual streamer and DAC, at as high a level as you can afford that is compatible with your other equipment. If you would show us your system we could be more helpful.