monster rca cable upgrading cables issues

I am trying to upgrade my cable, I am about to get jolida tube amp. I have bose 4001 direct reflect speakers. I know I have to get better one. Like most people out there, I have limited funds....

any way I am trrying to upgrade my rca cables.... I think I will connect to my old marantz cd-73, Like I mentione that I need to upgrade my rca cables too do you have any idea that I could purchase ok rca cables? I have no idea about them so please help me. I saw monster rca cables form cicuit city is it good