As I agree with Ghosthouse that upgrading speaker cables first is the way to go, you have an even three-way split so far. And like Metrella I also prefer solid core speaker cables; they are the only type of cables that I hear a distinct improvement with.
Concerning PCs, they are last on my list. All of my equipment is plugged in via upgraded PCs from various makers and if they make a difference it is subtle (please don't take my Audiophile club membership card away).
Concerning PCs, they are last on my list. All of my equipment is plugged in via upgraded PCs from various makers and if they make a difference it is subtle (please don't take my Audiophile club membership card away).