I'd go for the 2003 version first, partly because you get the stuff like the Youswell story as a story rather than as a passing mention, but also because it has a really angsty end, and then Brtherhood has a much more happy ending for your finale. While others prefer the angst. Another point for viewing them that way is that you see the animation and CG| improve. heart Plus you get more skin on show (Ed, Winry, Mustang-so-hot, Ling... oh the yummies) as your second portion. But some people like dessert first. Good luck!