Cable for vintage Rotel tuner

Just got a revised and internally upgraded vintage tuner, Rotel RT1025. The tuner has to be reburned in, but it sounds really fantastic. The sound is detailed, has a good soundstage and is threedimensional. But it lask a bit of 'warmth', body and 'fullness' (which could be attributed to the burning in proces?).

My system is : Kharma speakers, Symphonic Line integrated amp and Nirvana SL speakercable (soon to be replaced by SX).

What (rca) cable would be a good match? I'm looking for a 'top end' cable, since I think radio is an equal source to digital and vinyl.

Thanks