My first thought when I saw his pictures was, "Tennessee walker." He has the overall build that I see a lot in TW, or just usually gaited breeds. I'm not sure that I see either arabian or quarter horse in him. How old is he again? He's definitely pretty, I love that last picture that you posted (in the first photoset, of him running)!
edit- the more I look at the first photos you posted, the more I come to think that he might actually be a quarab... I take what I said back, he could be a qh/arabian (technically paint/arabian).
Last edited by soenjer55; 05-11-2013 at 08:34 PM.