I have 926s. I think he can't go wrong with Cardas speaker cables - Golden Reference in particular being an excellent choice. I however use MIT and love them - they aren't bright at all and allow microdynamics to develop more fully than other cables I have tried. They also excel at soundstaging.
If he wants to stick with Oehlbach, the XXL Series 5 has gotten very good reviews in France, stating it is "very detailed but never aggressive" which sounds like his style.
Arthur
If he wants to stick with Oehlbach, the XXL Series 5 has gotten very good reviews in France, stating it is "very detailed but never aggressive" which sounds like his style.
Arthur