Reasonable but not outragious interconnects

"Ideally one wants to spend 25-30% of their budget on cabling."

Sounds excessive but your money your ears.

I use and love Anticables. The owner, Paul Speltz, is very helpful and friendly. They have all price points and have a trial period and an upgrade option within 30 days I believe. I'm very happy.

I’m a little surprised no one has mentioned Surf Cables. They seem to try to take the “snake oil” out of it and just use high-quality materials and solid construction techniques. 

I’ve used their products for most of my system, and John, the owner, is great to work with. The cables sound and work great. 

https://www.surfcables.com

OP: I’d recommend a decent set of Canare IC’s per the suggestion of others. I’d go further and recommend Schroeder Method Dual Canare assemblies per “Celander Specification” from HAVE, Inc. Speak to Gary P. in sales.

These IC’s are far better than anything you can obtain for the same money.

You didn’t mention your sources nor the nature of the amp design (class A, AB or D). If your amp is a class D amp design, then you might not want to use these particular IC’s without first consulting the amp manufacturer about the stability of their amps with respect to potential amp (and speaker) destroying oscillations created in their amps by using these ultra-wide bandwidth IC’s. The IC’s are fine with source-preamp interconnections.

https://forum.audiogon.com/discussions/doug-schroeder-method-double-ic