Nordost vs. Transparent...which is better?

Visited the Nordost booth at the recent TAVES (Toronto A/V show) and spoke with Mike from the company. Great sales pitch without being too "over-the-top". Made a few very interesting points about the product which made sense to me. My question to those of you who have Nordost cables is what should I be focusing on first: Power, Interconnects, or Speaker cables? I am currently using Acoustic Zen cables throughout my system. I do like the sound I currently have but I am toying with this idea that I can make it sound even better. Oh, almost forgot, I am using Joseph Audio as my speakers and Prima Luna as my amplifier. My CD player is probably going to change but at the moment I am using a Rotel.
Any suggestions would be much appreciated.

Thanks Tom! Now I need to make up my mind on which "level" to try for my system and find a store near me that sells the products (though that shouldn't be too hard!).
I will let you know what I get and what my results are like in the near future.
Thanks once again!