I've found for my own tastes and systems that having an most revealing, finely resolving cable up front, one can usually step down at least one level thereafter... like if you are using all of one brand cabling. RMV
The term best interconnect here is disturbing too. Best why? Best how? Good and bad too are confusing words when it comes to subjective assessments.
I found early on as a general rule only... the more money spent on wire (to a point) the better it worked or sounded, by and large. this isn't to say merely throw money at it and assign cables to positons based on price tags alone. There are more considerations than that. you really do have to try some for yourself.
I have 3 ICs I can move around in my 2ch rig, as either source or mains. Each pair has it's own voice. Moving them around changes things from a little to a lot. Each combo yeilds a differnet take on the music.
Maybe you would want to give the Cable Co. a call and try a few different types to get a feel for what's out there and how your system will respond to cable changes.