I have not read the entire thread, so forgiive me if someone else has said similar things. And this is just opinion, so take it with a very large grain of salt - eventually it comes down to you. I always say, "play what you like".
I have tried Revo 12.9 and 12.4, Cuetec, Jacoby, Meucci, and Pechauer. The Cuetec feels the most like an old wooden shaft to me, but also had a lot of deflection. Jacoby is similar but with a little less deflection. I'm largely indifferent to the Meucci and Pechauer CF shaft - nothing wrong with them, but I didn't find anything special either. Revo 12.4 is OK, but it feels distinctly different from the 12.9, which for me is the clear winner - I knew as soon as I tried it that it is the right shaft for me. If you can try several of them, hopefully one will stand out so clearly for you as well - whichever one that is, get it and don't look back.
As to the white ferrule - I've always looked at the tip when setting up, not the ferrule, so I don't understand this issue. The white ferrule with a wooden shaft makes sense, but with a dark/black shaft a white ferrule would seem to be a distraction. Again that's just me.
Here's the kicker: if you think a CF shaft will make you a better player, you are in for a disappointment - it's a shaft, not a magic wand. I chose CF because of it's consistency and durability. No more dings, scratches, warping, etc. And every 12.9 I pick up plays exactly the same. With the wooden shafts I was constantly repairing damage and replacing shafts, but with CF that is no longer a thing.