I too like the Vivid's and will use any of them that I find. They do sell them at the course I play all the time during the summer, so I have found a few.
I find way more than I lose, and I give away the ones I don't want to play (friends, parents or the local course for the junior golf program), so I don't tend to buy any balls. I did buy the Kirkland balls and still have over 3 dozen as I have been using what I find.