Hey Krama
The Blonde Nasos we get here in NZ are greyish in colour with a little bit of yellow so you wont get much colours from getting a naso in your tank. To get the colour in my tank I went Yellow tang (always available in your LFS) http://www.marinecenter.com/fish/tangs/yellowtang/
Sailfin tang (sometimes available)
http://www.marinecenter.com/fish/tangs/sailfintang/
Also have my Naso tang, I got it cause they have such a fantastic nature and adds a different body style to the tank.
I would love to have one of these for the big fish only tank http://www.marinecenter.com/fish/tangs/sohaltangredsea/