I missed a bunch because I'm too damn picky when it comes to investing in a bowling ball.
Let's see, there's the One series, the Gamebreaker (every re-release as well), the Cell series (although I did throw a friend's and didn't care too much for it at the time), Dimension, 920T, Rising, Uprising, 505 series, 715C. Those are just a few.
However, I got a barely used Power Machine and Mean Machine from a friend that's a ball whore. He didn't like the fact that the thumb was drilled a little too big and never used the balls. All I had to do was open the thumb a little bit with sandpaper and I got two of my 3 favorite balls of all time. The other being my Brunswick Punisher that I really learned to bowl with.