Transparent Audio IC's and Speaker Cable

I'm using Transparent Audio Supers for the IC, and Transparent MusicWave w/ Transparent Jumpers for the speakers. I'm debating whether to upgrade to the Ultra IC, or MusicWave Plus speaker cables. I'm looking to get a bigger soundstage, and better seperation of instruments. I do plan on auditioning both, but I was wondering what others experiences are.

Rest of my system:

Cambridge Audio D500
Audio Refinement Complete
Monitor Audio Silver 5i
NHT Subtwo
stock power cords (I'll be making my own PCs soon)
Home made isolation system based off of symposium's stuff (it actually works very well, big improvements in soundstage, detail retrieval, and noise floor)

Thanks,
Gil