TH,
It's too bad you already bought the I/Cs, P/Cs and S/Cs. It would have been good if you had taken the contact enhancer your going to use and your favorite RCA plugs and spade connectors to put on the ends of the cables you were considering.
It would have also been useful to contract the power company that feeds AC into your home and to have had them run dedicated lines that mimic your AC into the audio shop you were auditioning at. Then, within a 2 to 3 square mile area, ask all the business's to cease operations that require any AC usage for about 4 hours while you audition stuff.
A little more time and effort but
.Oh well. :o)
Hope I said something,
Robert.