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
Thanks for writing.  As for yor question about being able to put Dominante in the pasture with Artax, I think that it would be fine.  True, all horses do fight a bit when they first meet, but I don't think the fighting would ever get really serious since only one of yuor horses is a stallion.  There will also be a chance of less fighting if Artax is a clamer stallion or if he hasn't been used for breeding a lot.  A stallion that has been used a lot for breeding tends to be more agressive towards other horses.  Also on the plus side is that you have a lot of good pasture space for the horses so even if they don't get along they have room to stay out of eachothers way.  As for a bumpy pasture, it usually is not a problem, as long as none of the bumps can somehow cuase an injury, like hidden holes or sharp ends form rocks.  And if you absolutly have to move into the city, I'm sure the horses wouldn't mid being kept at a boarding stable.  But the land you have seems pretty good for your horses.  If you have any other questions feel free to ask.