Nah, I think he's better at the two being long. A lot of the SF's right now are much bigger, I couldn't see him guarding Lebron like Pierce could. And Durrant would just shoot over him. His frame is a bit small, so adding too much weight might not do him well.
Hunter is a solid SG, and I could even see him playing PG a bit. Once his outside shot starts hitting I could see him and Smart being a tough duo.