When the High-Lip is on sale, it's a no brainer. You don't even have to buy the top case half from the standard ball, you can just sand/cut the lip off. It's just soft plastic.
As for the High Ball, I always thought I'd like one- more ball above the panel seems like it should be a good thing. Then I finally saw one installed on a game. Not only did it look wrong to my eye, but I did not like the feel of it. My hand would actually slip down the side of the ball to the panel, and get stuck there, instead of skating back and forth over the top of the ball like it does on a normal one. I suppose I could get used to it, but I don't think I will.