Holden Commodore: Best transmission fluid

When I had the automatic transmission in my VX Holden serviced recently I was told that the Holden recommended original Dexron III transmission fluid was no longer available, that it had been replaced by a lighter form of Dexron III. I was also told that the new fluid had not been in the market sufficiently long to prove Holden suitability, and because of this, and on recommendation, I chose to have the transmission refilled with Dexron XI, which I was told was a better quality lubricant. Would you please confirm that Dexron XI is indeed suitable for the VX transmission?