...which is very thick for the connectors so I'd advise against it for the difficulty you will have attaching it...
+1; you don't need uber thick cables for the line-level runs. You definitely don't want to be pulling and yanking back there to get thick RCAs to fit snug either.
I always use good shielded cables for line level and lower.
Agree here, too. One exception, however, is Kimber's PBJ (and possibly others from Kimber of similar design - never did go higher). They sound and look great, and at least from my experience, the noise rejection of the braided geometry is real (or I've been lucky).
But I've always qualified my stance on cables: I have a hard time discerning differences between (one school of thought), but don't want to hook up my system with HD lamp cord either (the other school of thought). If you can hear a difference; great - go after what you can easily afford (the PBJs many years ago when I bought them were $70/1m pair; they look considerably more expensive now).