Primary cables are a multi strand 12 gauge. I have used Monster Cables and brand X. At times I switch to MIT terminator 3 speaker cables.
I am a big believer in 12 gauge multi strand wire. The Monitor 3 sound good to my ears with the few I use, and have not found the speakers to be fussy.
Not a big convert in exotic and expensive cables, with the thinking that room treatments have much more bang for the buck. but I have open mind. Should you come across something that make these great speakers sing all the more, please post.