I've never owned SMB's but I've been on horses who's owners demanded that I put them on. And I thought they were nice, but they retain water very easily. Guess it depends on what sport you do.
I don't like the Roma's for two reasons: A) they have fleece. And B) They are open fronts. I really don't see the point in open fronts at all. Why not protect the horse's legs all the way around
My vote is for Woof boots