heartland cables???

So I bought some Heartland cables a few years ago. I think I remember the site saying canare cable was used. I have some speaker cables and some ic's with the eichman bullet plugs. So how good are these things? How much money would it take to upgrade? Right my setup consists of Klipsch kg3.5's, Aragon 2004 mkII, Yamaha rxv-659, and a cheaper Pioneer cd player. How close are the cables to a weak link?
I have some heartland cables also bought a few years back, and they are as good as other Canare based cables. I would save money towards a new component, such as a new CD player.
Point taken