Hi I'd start a new post on the acoustic issues. That's a critical area to address also.
I've used Transparent, Cardas and Purist all to great sounds with my Wilson's over the years. They all have strengths and weaknesses. I would not discount the networks due to purer signal path. You want purest signal transmission (the networks don't cut the cable, just add stuff to strip away rfi and correct imdepence)
I your price range I'd look for Transparent Ultra mm2 or Purist Venastas as the best choices used. I think you'll find the transparents have better bass control, better image, and maybe a little quieter, the Purist more transparent and delicate. These are not night and day things...more subtle. Both great cables and you can't go wrong. ymmv
best of luck