I recently upgraded some of the cabling in my system with products from Zcable.com and have been very, very happy with the results. They have an interconnect called the Jazz4 that falls within your stated budget.
I have never replaced a captive power cord but I think the Absolute Power cord would be a good choice. Zcable makes a power cord that costs $125 that is smoother and more detailed than the Absolute.
Zcable products have a 30 day satisfaction guarantee. Of course modifying a power cable will probably preclude this. I have been really impressed with the performance, value, and customer service that Zcable offers.
I have never replaced a captive power cord but I think the Absolute Power cord would be a good choice. Zcable makes a power cord that costs $125 that is smoother and more detailed than the Absolute.
Zcable products have a 30 day satisfaction guarantee. Of course modifying a power cable will probably preclude this. I have been really impressed with the performance, value, and customer service that Zcable offers.