My money is on Morab with a strong emphasis on the Arab part of that equation. He's very light-boned, and I agree that his jump looks like an Arab jump. (I have ridden and jumped Arabs and own a half-Arab, so I feel marginally qualified to say that.) That said, his face reminds me of my own Morgan gelding. He could be an Anglo-Arab, but his face doesn't have that TB-look to it. If you know what I mean. I'll be interested to see what he looks like after you get more muscle on him and after his neck gets in better condition. I'll bet he's going to be cute.