Buying a new horse?

Question
We've been looking for a horse to buy as a companion for our horse. Now finally there's a 13 year old Peruvian Paso stallion(uncut) named Dominante for sale really cheap, and he's amazing to ride.
I own a 7 or 8 year old, mixed gelding named Artax, a little over 13hh. I'm wondering how they would get along if we bought Dominante and put them in our pasture together. I know all horses fight a little when they first meet, so I'm a little scared they'll hurt eachother. But, if we buy the stallion, they would probably have to be in the same pasture eventually.
We live in a pretty big piece of slightly bumpy land, with a medium sized pasture with good grass in it, closed off for our horse. It's slightly slanted, and at the lower part there are a few tall cyprus trees making a little forest. it gets really muddy at that part in the rainy season. We also have a berry field and our front yard, which have good pasture grass too. The berry field grows lots of berries and some guava trees, and its very bumpy.
We're also thinking of moving, but our horse is all alone in his pasture, so we're kinda stuck there. We could board Artax and Dominante at my riding school if we have to, but we'd rather have them at home. But, it's more likely that we'll find a house in the city without any space for the horses.
Ack! It's so confusing. Do you have any advice? Even a little comment would be alot of help. Thanks,
-Hani

Answer
heya,
 Dont worry too much about the horses fighting when you put them in together. If you introduce them to each other slowly, then that would reduce the risk of accident. I reccomend putting a fence up halfway through the field, and putting one horse in one side and the other horse on the other side, so it gives them the chance to see each other and sniff each other over the fence without the new horse invading your horses territory too soon and too fast. after a while like that, remove the fence so that they can be together. if there is any sign of them not getting along, put the fence back up and try it again later on.
i hope this helped, and good luck, he sounds lovley!
emma