It's not a bad idea..
What you'll find with cables is that the materials and geometry can make a big difference.
So, there's a good possibility you'll hear differences using different cables. Whether or not it's an improvement depends on all the other parts of your system.
If you'd like to experiment somewhat cheaply, DIY is a great way to start without dropping loads of cash. Here's a good resource: http://www.image99.net/blog/files/be8de0c383c5434907610d6b55049e69-75.html
DIY is great for isolation as well. I use springs from Grainger under my components for isolation.
What you'll find with cables is that the materials and geometry can make a big difference.
So, there's a good possibility you'll hear differences using different cables. Whether or not it's an improvement depends on all the other parts of your system.
If you'd like to experiment somewhat cheaply, DIY is a great way to start without dropping loads of cash. Here's a good resource: http://www.image99.net/blog/files/be8de0c383c5434907610d6b55049e69-75.html
DIY is great for isolation as well. I use springs from Grainger under my components for isolation.