Rail at ceiling. Rod a few inches above the header.

Upto ceiling. Will showcase the room height. Half way cuts the walls short and as the eyes flow around the room, the eyes jar at seeing the curtains halfway. Non custom is perfectly fine, just ensure hemmed to correct height.

You can use 95"-96" or 108" ready made drapes. 9' ceilings tend to already give the feeling of height. Either height will be appropriate. No right or wrong here.

I'm not a fan of all that wall space that will show between the rod and top of window if you hang the rod to the ceiling, especially 14" worth. I would put it midway at the most, unless all the wall space won't bother you.