One can't say what would be a more drastic change i.e. swapping the speaker cables or the interconnects, as it would matter what make / model for each that you intended to go with. Even then, some of that would be guesswork, especially with IC's, due to system synergy and the impedance related issues. As such, speaker cables would be the easier route to go, but even then, there are still quite a few variables involved depending on the choices that you make.
I think that Richard uses and recommends Audioquest cabling. Whether or not you go this route is obviously up to you. Most of this will boil down to your personal preferences, system goals and system synergy. Unless one has an identical system with very similar sonic preferences, the only thing that you'll get here is recommendations based on one's own personal preferences within the confines of their system.
There may be some technical issues involved in why some speaker cables work better / more uniformly than others in most SS installations, but all of that has been covered in the archives. Whether or not one likes the sonics that the technical advantages that these speaker cables bring with them boils down to personal preference. In most cases, people "band aid" their systems using cables as a tone and transient control, making such changes and recommendations a crapshoot at best. Sean
>