RCA Phono Interconnect Under $400

There is a Cable that you can consider to use and one that I have been demo'd is the SAEC SL 5000.

I have heard Zavfinos in a price range that went up to the Silver Wire design. 

I have yet to be demo'd the Zav'o TOTR design, but do know somebody using it. 

Saec has left the most indelible impression for the quality of sound and influence on the music production. 

Cardas Clear Cygnus. Slightly over your budget, but worth it.

Do you need a cable with a DIN connector at one end and RCAs at the other, or is it RCA to RCA? Do you prefer silver wire or copper? One advisory: you want hot and ground to be carried on equal conductors, separate from the shield which connects to ground only at one end. Many phono cables carry audio ground on the shield. That’s suboptimal.

RCA to RCA.  Since money is an object I'll have a look at the used cable store.

Here ya go!