As far as my experimenting with pipes...I don't
I used to be that way. That was a nice place to be too. A tuning God named John Golden had for years recommended the old White Brothers E Series for baggers. I liked the look of them too. And they did work as well as advertised. So never even had to think about it. On any touring bike when true duals and a pair of E Series.
Then about the same time I got the red bike Tommy White had sold the company. Marketing decisions were made to go back to their dirt bike roots by new ownership. And I ended up getting one of the very last sets of E Series available in the entire country at that time.
But sometime they'll have to be replaced. Then will have to figure out what is "best for me" all over again. Actually, screw it; I'll just ask John Golden again.