Need advice on rich sounding cables

Within your budget you might want to give High Fidelity CT-1 a try. Most reviews claim they have in spades the very qualities you're after.

The more I think about your quest, the more I think you should listen to some cables with gold in them, at least before making a final decision. "Rich sounding" is gold's trademark. The list of cables with gold is getting longer, but a couple of well-respected brands include Jade and Gabriel Gold. If you want to try gold on the cheap you might look for a used pair of Stealth PGS, often available for $400-$500/pr here on the 'Gon.

Hi! From all that I heard in my life . the best Echole Signature . Except for the money then OMNIA

2nding the Clear Day Cable suggestion from Mcondon. Below your budget but hopefully that's not a problem. An audition of Paul's double shotguns would be risk free.

RichardS,

Apologies for not seeing your post earlier. My speaker cables are not appropriate in bi-wire configuration, and sound far worse than a single pair with jumpers....
Bi-amped is fine, but I think you're being kind in saying anything positive about my speaker cables bi-wired.
I would strongly suggest you try my speaker cables (or anyone else's) in a single wired, diagonal configuration as suggested in this PDF from Audioquest -
http://www.audioquest.com/wp-content/uploads/2012/02/UndrstndgBiWr.pdf

Regards,
Paul Kaplan
Kaplan Cable / Waveform Fidelity