It's purely a matter of personal taste, but I like the flowers of my Phals to cascade down naturally. So I never stake them. You might want to leave a few to their own devices, Chris, and see which you like better.
I have mine outdoors with pots fastened to a trellis or on shelves, so they show nicely when hanging down. If you're going to bring them in to display on a table, they might look better staked, but it really depends how you will place them.
I know a gal who decorates her mantelpiece with cascading Phals in winter and it looks so beautiful. Needless to say she doesn't use her fireplace hardly ever, and removes the orchids if she does.
