Bear in mind that if you have two equines as company for each other you could potentially have problems when you try to separate them - ie, when you want to ride! You don't have enough land (or would probably even want) three, perhaps a couple of sheep might be okay - although you'd have to be careful they didn't get kicked/trampled and would have to have a separate area where they can escape to.
The horses may be okay, but it's worth bearing in mind they can get very bonded to each other.