@erik_squires - I'm not looking to 'invest' in anything. I'm simply putting the question out there, as there seems very little discussions going on around my question.
@fuzztone - I'm not frugal, quite the reverse, but I'm also not dumb. I don't see the need to spend, possibly, thousands, to get no, or very liitle SQ improvement. I'm willing to try anything out. I'm open to all possibilities - although expensive fuses in your mains pre/power amp input is where I draw the line! In a speaker, yes, maybe, as they're in the direct line of music. People get drawn in by 'good' dealers selling Foo. 'Good' meaning good at their job, the job of SELLING stuff.
@tomic601 - Where would I use the Jitter Bug in my scenario? The Jitter Bug that's been reviewed many times, and most conclusions are - the only thing a Jitter Bug does is relieve you of $60/£50!
@jond - So you spent c$1k. My NAS (920+) + 3x6Tb drives came to about the same, but my 32Gb stick was £12. A slight difference. And music from the stick sounds better. I've seen people who've spent c$10k on a streaming setup. Maybe they couldn't directly stream into their renderer from a USB drive/stick; maybe they haven't even tried it. Scared to no doubt after that expense. c$10k v $10. One would imagine/think/BELIEVE that the $10k setup would be much better. If so, by how much, if at all (that's not a question btw)?
@akg_ca Thank you, and everyone here, for the useful input. Although you say the USB is equally good as your NAS. There's so so much written about LOTS of noise produced by a NAS/Switch/PC/Cableing, and how much one needs to spend to alleviate it, which is what prompted my original question. A USB stick obviates the need for any of that, IF your renderer has a USB input.