RE: Pro Hunter v Savage v White
mo bowhunter,
Welcome to the forum!
Any of the rifles you mentioned will serve very well indeed. All of which have their own features and idosyncracies. Not having shot the ProHunter Encore, I cannot tell you anything other than they should shoot very sweet.
Your best bet is to shoulder and sight as many ML's as you can to gain a feel for what best suits your need. You are the one that has to carry and should the weapon, so let your instincts take you the rest of the way as you have selected excellent weapons. Knights are also very good. As far as smokeless, that's up to you. Really other that cleanliness, there nothing the Savage can do with smokeless that it cannot do with 777 or other cleaner shooting substitute black powders. Even with smokeless, you still need to clean the Savage.
I have shouldered the ProHunter Encore and it really feels sweet at the shoulder. I will have one either this year or next.
To sum up, put them to your shoulder and ask alot of questions. Don't rely on the sales clerk as they are there to sell you something.
Most of us here are not.
Good luck and welcome!
Tahquamenon