Hello, Quix!
I have a HP 8000. Yes, Toyo K-500 is the best ink for HP. They are very stable. The problem is that in Russia they are not commercially available, and original inks are very expensive. I had to try other inks. Techink Platinum ADVANTAGE SK I also tried it on my printer, but they did not fit. There was a strong dust from all colors of paint, setting up tension head has not helped.
More than a year using inks Sun Chemical (Streamline Optima Series). They are suitable.
What series of Bordeaux, were you using? How the quality?
Thank you!