@malbor -
Talk to these guys* about your desires/requirements/budget constraints and they’ll help you out.
You can audition cables in your system/room, with your own ears and sensibilities, for a fraction of final costs.
Whatever the rental fees, from their lending library; they’ll be deducted from the purchase price.
In my system, I’ve been using Kimber (Select 1130 and 1030), Synergistic Research (Tesla Apex, Analog Tricon, a couple A/C Master Couplers w/MPCs), Zu Cable(I still love their Mother PC) and Analysis Plus (Big Silver Oval speaker cable) for quite a while, without feeling need to change anything, far as they are concerned.
Listened to a variety of cables on trial basis, for the performance I desired, then: bought the above new (from the same guys)
Those companies are top of the heap, regarding quality and sound/presentation (to my ears, anyway).
*https://www.usedcable.com/contacts
They’ve stuff in every price range.
ie: https://www.usedcable.com/interconnect-cables.html
https://www.usedcable.com/speaker-cables.html
https://www.usedcable.com/power-cables.html