It's a personal preference. Unless you are competing in jumper shows, what you decide to use is really what you will prefer putting on as well what you will find provides better protection.
For a long time I used Professional's choice on my one gelding and used polos or open front jumper boots on my other horse.
I no longer use professional's choice as I find them hard to keep clean and require regular brushing or rinsing.
What kind of riding are you wanting to do? And what level?