I admit that I did not take availablility into account T Bolt, although I could have known. Over here in the Netherlands I have only found two or three (web)shops that carry a good selection of Gunze products....one of which happens to be my trusty airbrush dealer, so whenever I go there for whatever reason, checking what paints I might need, and if a Gunze variant is available, is part of the routine. However, if you feel like giving acrylics a serious try I think you'll find that the extra effort it may take to obtain Gunze acrylics will pay off in terms of how well it works.
After having tried a few Gunze colors, I'm now at a point where I want to gradually move towards Gunze paints as my primary paint of choice (if at all possible) In other words, if I run out of a certain colors (vallejo, revell aqua, etc. etc.) I will look for a Gunze replacement first so as to gradually replace my paints with Gunze as I go along.
Ofcourse it's still subjective as (air)brushing, at least to my opinion, has a lot to do with personal preference no matter what.