I recall a post last year where someone had some stats that showed the Hawks best lineup was with Al, Josh, Joe, Mike and Jamal. So its either 3 guard or Joe at SF. They play that lineup a lot, particularly near the end of close games. Why not just make that the starting lineup? Joe is as big as most SF's and is at least as good a rebounder as Marvin. (Of course, this all ignores the fact that Joe, Mike and Jamal are not playing that well this year.)