My purpose is some general display but flexible to troop in and even do the odd cross country skiing in. Restricted movement is a definite nono.
I really don't care about authentic origins.. ( ie 2 bum buttons vs 1 = details that are never seen)
Function is key.
The SDS Battlesuit though looks warped appeals via multiple uses (wardrobe wise).
I am an original 3.75" figure collector and I am more on getting good detail in a full costume that mimics the general likeness without all the mistakes, bad wearability, or fading low quality (yellowing) armor.
My biggest mistake would be to buy something so authentic it is too brittle to wear, or ABS acrylic covered that it makes the suit immobile.
I understand the difficulty of politics with 501st, Lucasfilm and organizations like originalstormtrooper (SDS), please feel free to PM me a straight answer that gets the results without having to become a prop builder.