Everyone is entitled to their own opinion regarding what sounds best in their system.
Personally, I know that in the world of high end audio what sounds good in one persons system can sound different in someone else's system.
I've found the Porter Port outlet to sound good and is a big bang for the buck. I still use some in my systems.
I purchased two Maestro outlets and thought they were good but I did not hear all the hype that I had read about and the cost; ouch!
I'm currently extreamly happy with the Furutech GTX-D (Rhodium) outlets that I'm using. High cost yes, shop for a sale price, but at least in my system I very much like what I hear and that makes the price not hurt so much.
It's all about personal preferences, system dependencies and differences.
I’m sure there are other great sounding outlets out there but at what time does one stop the search?