Clover was one who use to rush fences horribly. He was jumped way too high way too soon by the person who had him before me. The previous rider use to basically get him straight to the fence and then just use the crop on his butt all the way to get him over the fence. No wonder the poor boy wanted to rush. Then when I got him, he was my first horse and I was so use to pokey lesson horses, it took me a while to learn to use my seat and not my hands (which never worked!) to slow him down. Anyway, he did learn to slow down to fences, and does well when he is in consistant work, however, I have had to give him time off and when comming back, we always have to kind of start over with the fences. Although he learned to slow down to the fences, he will always have that tendency to rush if he has not been worked regularly (nervious habbit maybe or too much energy or a combination of both). So, you really have to decide if it is something that you are willing to consistantly work on. You said this is going to be your only horse, so if you want something more laid back, than maybe this is not the horse for you. But if you want a good challange, it sounds like you instructor feels you are ready for it and can handle it and this could turn out to be a great horse. I know that when I first started leasing Clover, it took a lot of convincing by my instructor that I was ready for a challange like him, but he turned out to be a great horse I ended up buying him a few months later and now, it's five years later and I love him to death!