I know of a few folks that added a bar facing the spa and asked them do you use it. They all said it sounded like a good idea but the amount of time you spend in the spa (15-30 minutes) we do not use them.
As far as shading the spa I would never do it. The spa is mainly used at night and I enjoy watching the stars.
Either one of your ideas is personal preference, it all depends on what you like.
Gary