Phono Cable Recommendations

I'm partial to Synergistic. Since you are DIY however you might want to try converting your phono IC to Active Shielding. All you will need is a Synergistic Active Shielding wall wart (or other 30VDC power supply) a couple resistors, a couple caps, and 2m battery ground strap. Slide each phono lead inside, solder the resistor and cap in series with the strap and power, carefully secure the strap so it extends all the way to the very end of each RCA - but no further. This may eliminate your RFI even without power. With power it will massively improve just about any interconnect. Or speaker cable. Or power cord. But it is hard to find battery strap large enough for those. If it works and you like it then have Michael Spallone mod the power supplies with better diodes and caps and your jaw will drop.

I use Silnote, it replaced a Morrow PH4. Silnote is low capacitance and shielded.

https://www.mcssl.com/store/silnoteaudio/morpheus-reference-iii-rca-phono-cables

That's a good discount on the Silnote. How did it compare to the PH4? I assume the PH6 is a significant upgrade over the PH4 as is the Silnote?

I am using Audio Envy Phono Deluxe (DIN>RCA), $268 for 4FT. 

https://audioenvy.com/product/home-car-pro-interconnects/phono-deluxe-matched-pair/

https://forum.audiogon.com/discussions/audio-envy-dang