What interconnects work best with Audio Research?

Then get yourself Cardas or Kubala Sosna wires. They are both on the warm side and have a lot of texture.

Thanks, which of the Cardas line up should I use.......

Also consider Harmonic Technology Magic IC and Pro-9 speaker cable.
These no-nonsense cables sound wonderful and are resonably priced on the used market.
I've used HT with ARC, BAT, Parasound etc. and have never been disappointed or felt like "something was missing".

I used Audio Magic cables accross the board with my reference Audio Research set-up and it worked great. The Audio Magic line-up is similar to the 'silver litz' cables that Audio Research use to sell except that they are updated and more refined.