I have one OB Classic Pro with the Everest tip it came with and it's okay.
I have another OB Classic Pro with a Kamui Black Soft and it plays very well.
My other (2) OB Classic Pro shafts have fellow AZer pooldawg8's "milk dud" tips on them and they play AMAZING - the best! In the process of changing out the first two Classic Pros' tips to milk duds.
Read the multiple reviews here on AZ about them. I'd never go back to another tip (especially a relatively expensive Kamui Black) again. I purchased 12 milk duds for $38 shipped. That's $3 each plus $2 shipping!