Canare 4s11 speaker cables are great and it is not expensive. Regards to interconnects, Canare GS-6 guitar cables, it doesnt get much better than that and its inexpensive.

I own an Eico ST 40 tube amp as well as vintage speakers from ESS labs. These days you dont need much more than a Blue Ray player. Turntable is American as well AR ES-1.

Cables do alter sound and can ameliorate the sound of a system. Its not necessary to spend a lot of coin on cables.