I would actually advise against using polo wraps. They may come undone, slide down their leg and they really don't offer much support. They should be used on the flat or for warming up.
Those look like nice boots, but I myself have never used them, nor have I known anyone that does.
I have jumped my mare with splint boots, as well as open front boots and nothing at all.
I think, for low level stuff, its just a matter of choice.
Though in the spring when I jump my gelding, I'm not going to use boots so if he hits the pole, he'll learn from his mistakes. When we get further into it, I'm sure I'll throw on a pair of boots.