Of the ones you mentioned, I like the Tradition's PA Pellet flintlock. I like the idea of the removable breech plug. All the years I have shot sidelocks and I know they were cleaned properly mind you, there is just something about being able to look through that barrel and see for myself...

Also I have read other posts from people claiming their PA Pellet was a real good shooting rifle with
"loose powder."
Unfortunately, I would have to agree with eldeguello and get a Lyman. They have so many different selections in the kind of rifle barrels they offer, and their quality is excellent.
I have been looking at a .54 caliber Great Plains Hunter with the 1:32 twist in flintlock. I just have not talked myself into getting a flintlock rifle yet. I think this would be a conical shooting devil. Not to mention a beautiful addition to my collection. If I pass on that I am getting a White Super 91 .504 caliber.