If were talking about SF's, then Barton isn't in the picture. I have him in my SG lineup. He has a Kevin Martin type build. Skinny as a rail, but a very good athlete. His shooting has improved this season, mainly because he's been going to the basket more instead of settling for contested jumpers. He has pretty good handles, and he gets to the foul line quite a bit. He's certainly a better defender now than Martin was when he was drafted. One strange thing is that although he's a sophmore, he's already 21 years old. Not sure why, but I know had accademic problems when he tried to enroll at Memphis, so he may have been set back a year.
The obvious weakness is lack of strength, something that will become more revelant in the NBA. I don't see any way he can play SF in the NBA with his slight frame and lack of weight. Personally, I want my SF to be a minimun of 6'7". I'm sick and tired of 6'5"/6'6" John Salmons type players pretending to be SF's. I'll admit that Barton has a nice wingspan, but sorry, I'd rather have a legit SF, who also has a nice wingspan.