Initially, it was the Black XXXL, and then the Buzzsaw XL. Both balls were hit and miss.
Then, the Tsunami came out. This ball has been great. A benchmark ball. Doesn't over-react, and has such a smooth backend movement. Rolls just like my Danger Zone, but not as flippy. Ball was bought in 2005, and is still in the bag. I bought a spare Tsunami from my son, so I will have a replacement just in case.