I think part of Nordost's appeal is those cool, bright skin colors they use to often identify the cable, especially the "Purple Flare" and "Blue Heaven"
Absolutely agree, as vanity definitely motivates a buyer. I'm sure some guys buy Nordost, put them in their system, and before playing music, step back thinking, "Wow, they look great!"
IMHO, it is very important to NOT think about how each particular cable sounds, but to think about how each cable could affect the sound you currently have. If your system is a little bright, then it is very unlikely the Nordost will eliminate this, and very possible to add more brightness. However, if your current sound is somewhat rolled off in the upper treble, or a little dull sounding, then no doubt, Nordost would probably solve that problem.
System synergy is very important, and I have often compared this to making a casserole. If you eat a casserole you just made, and find it a little salty, you don't pick up table salt, and add more. The next time for making the casserole, you just alter the recipe. Also, a certain spice can be great for numerous recipes, yet horrible in others.
So, here are your descriptions of how these cables sounded.
1) "especially its ease of sound and transparency"
2) "great sense of musical rightness and solid imaging"
3) "somewhat blown away, despite a bit of some of brightness"
Which characteristic is most important, as an advantage to try, or a disadvantage to avoid, in changing the sound of your current system?