In this case I don't think you should be leasing any of those choices. The four year old stally may seem perfect right now but I don't think that he would be a good choice because he's young, so he's probably green, making him not a top choice if you like to jump, for your own safety. As for the 16hh pinto, he seems like a decent choice except the fact that he's only 5. If you're looking for a jumper the two barrell racers are out of the picture, and you don't want a horse with a bad attitude because that will cause problems in the future for you. If it's possible, you should look at other choices, such as off farm leases and board somewhere. If that's not a choice for you I suppose I'd go with the pinto, just get miles on him.