What is an excellent power cable?

Do the sonarquest power cord connectors make a difference? 

Triode Wire Labs. Some of his product comes under your limit.
Also, try thecableco.com. They have a lending program where you can try out some cables, and all you have to pay is return shipping and a 5% restocking fee.

All the best,
Nonoise

I would check out a Magnan. Ken Stevens from CAT was at a demo here in Indy and bought for his entire system

Cullen Cable thinks the Sonarquest makes a difference.  Check out his confusingly named Crossover II PC, now made with the Sonars.

The Cerious Technologies Matrix are a little more than your $500 bogey but will impress the heck out of you.

ozzy