Long story short: A player can choose from different items, and wishes to have the best one. Would the player say:
I want to have the overall best item.
or
I want to have the best item overall.
?
Long story short: A player can choose from different items, and wishes to have the best one. Would the player say:
I want to have the overall best item.
or
I want to have the best item overall.
?
Both are probably fine but I have a strong personal preference for ending in overall rather than starting with it.
I think some of this has to do with the sense of it meaning the same as "out of all [of the items]" and thus having an implicit noun that it describes which fits more nicely when elided at the end of a sentence rather than in the middle. That is, "overall" doesn't really describe the item in our sentence but rather a relationship that item has to another implicit noun (the set of all items including the one which is the subject of our sentence).
Again, this is mostly a question of personal preference, I doubt that there's a truly 'correct' or more 'proper' choice that can be made.
There are also scenarios where, if I am not using another adjective like 'best' in your example, I might be inclined to put overall first "This modification increases overall efficiency" for example. However, if I am using overall in this 'relation to set' sense I'll almost always put it last.