Boots or bandages will not remedy the issues caused by hard footing. Studies have shown that in order to provide support, one would have to cut off circulation with said boot or bandage.
Please only use polos if you know how to wrap correctly and are diligent enough to re-wrap legs if you've done a poor job.
I use polos when ever I am "in public". So at my coach's place, riding in a clinic or on the show grounds, etc.. Otherwise I use open front boots on the front legs and polo wrap the hind legs. I might also use "dressage sport boots" if I am in a real rush, but personally I find that they can shift.
I would be very interested to try the Veredus Piaffe Evo boots.. However they are very expensive. (like $1000 for the set I think...)