I second everything Rob said. Cable type or price makes no difference to the sound quality*. The only time you might notice a cable change is from a passive guitar to amp and that is due to the friggin' things being sensitive to cable capacitance (most things are not but see *) But! You can have a lower capacitance expensive cable or a cheap one and V/V.
Mic cables need of course to be flexible and tough, at least they do for field work but in a studio there is often a lot of cables that hardly ever move. AI out to monitors for one example or runs to and from a patch bay (and those crazy good ole' analogue boys with m'track recorders and mixers!) These "static" runs can be made up with smaller diameter foil screened cable. Much easier to terminate and foil gives 100% RF shielding, even the best braid does not. Much cheaper too!
*Star quad cable is, as said a 4 lay cable where opposite wires are connected together in the XLR. This means that no matter the direction of the interference there is always a wire to pickup a cancelling signal. The downside is a stiffer cable and one with higher capacitance per mtr. The latter makes little difference to audio signals unless the lines are very long, >100mtrs say when you might get some HF loss or could upset some less well designed line amplifiers. Note, star quad does not give RFI protection because the balanced input amp with have long since lost gain and hence common mode rejection. If you ARE plagued with RFI some good 10k+10k INPUT transformers with an inter-winding shield are the best solution.
Dave. GRRRRRRR! Rob, not seen or heard of feeble new Nukie clamps. Do you have a picky and have you contacted them?