Considering switching to XLR cables,

@salc for less critical balanced conn I use Gustard XLR cables, featured w/ Neutrik terminations and sufficient quality cable. for critical interconnects Accuphase ASL/C series cables, 1/1.5/3m avail., work the best for me (pricey). 

What are you using for speaker cables, digital cables, power cords, and power conditioning just because all that matters?  While I’ve read nice things about the upper level KS cables the Fascination is at best mixed, which is I think what you’re wrestling with now.  I’d suggest trying these Acoustic Zen Matrix II XLR interconnects that you can get for $725 for two pairs, and if they don’t work out you can easily sell them for little/no loss so very low risk to try.  I have them and they may well preserve the warmth you like — they’re very natural-sounding interconnects — while adding some treble detail/air you may be missing.  Just another idea FWIW, and best of luck.

https://www.usaudiomart.com/details/650192584-acoustic-zen-zero-crystal-matrix-reference-ii-10m-and-15m-rca-and-balanced-11-pairs/

@soix -  IC and speaker cables are KS Fascination, Wireworld Platinum Starlight 8 USB between streamer and DAC, Power cords are a mix with original and Forte A3, with Amp and Preamp directly to wall with surge protection no conditioner. Thanks for the suggestion.

This year I celebrate my 50th anniversary of working with XLR connectors, also marking my transition from college hifi guy to professional audio. In every imaginable parameter the XLR is superior to the RCA connector.

But that's not the question. Is it audibly superior at lengths less than 5 meters? The answer is no. At longer lengths, over 10 meters, the answer is unquestionably yes. True balanced connections have much better common mode noise rejection, but until that reaches a meaningful threshold, who cares? 

If you choose to locate your power amps a couple feet from your speakers, and the preamp a 30ft cable run away, balanced - true balanced, not 'Pin 2' balanced (which is actually just unbalanced wired with XLRs) - works much better.  

Using XLRs for nearby peripheral interconnects is fine, but know  that in the context of hifi, it's just a vanity move. In an RFI dense studio, maybe not so much. 

Just calling it as I see it.

Another vote for Pine Tree Audio XLR cables.  I’ve also had a good experience with Blue Jeans cable including XLRs.  I have paid more for Audioquest but no significant sound difference.