cmb13,
I am an engineer, but I still let my ears (and my budget) dictate my purchases. I am not a "bits is bits", or cable disbeliever, or power disbeliever; and that has only come by hearing the differences with my ears in my system. I'm also not going to disagree with those that have differing opinions, we've all got to make our own minds up on what does, and does not matter.
Most any dedicated streamer has outperformed my old computer based streaming. My current system of a Bluesound Node 130, LHY linear power supply, along with good high quality cables provides an excellent streamer set up with an excellent interface for a combined $950.
You might buy a Node X (latest model) $750 or an Eversolo DMP-A6 $899 and try for yourself. If they better your current streaming set up, then keep them.....if not then you can return them for a restocking fee.
But most are correct, better streamers (also more costly) form Aurender, Innuous, Lumin, etc do provide better SQ.....I've tested Aurender and Lumin products in my system and they were much better than my current set up, and I'm saving for it's replacement