what interconnect and speaker cable is best for my system ?

I've been running two pairs of Purist Audio Colossus biwire speaker cable in a shotgun arrangement. It is the closest thing to the Purist Dominus that I have heard for a fraction of the price.

Purist Audio Design "Dominus" by far.

I have heard rumours that Proac have been sold to a company in China and if that is true I not sure if the quality will be as good as before.Ok back to your question,I have own Proac 1SC before and had good results using Taralabs cable.

I am using Harmonic Tech throughout my system, no regrets.

Look for Tara RSC Ref Gen in the classifieds. They are quite neutral and like most components are available used at about 1/2 list price. Cardas is also a good choice. Search the forum on cables for these brands for more info. I do not wish to slight other good products, maybe some other members will chime in with their recommendations as well. Good Luck.