Anything?, well, right now i'm into Fire Emblem, considering you have the consoles necessary to play it, i suggest you to play either FE7 or FE9 (Path of Radiance) those are excellent games.
The quickest option is FE7, considering you have experience with FE:A, you will master FE7 in no time, just adapt to the lack of Casual Mode, and you're set to go.
Yep, FE7 aka Rekka no Ken/Blazing Sword, was released in April of 2003 in Japan, and in November 3 of 2003 in NA (July 16 of 2004 in Europe), so yes that is the GBA game.
And PoR is the gamecube one, is pretty expensive, but with a modded Wii, and a good USB (Or virgin DVD) you can play that game with cheaper methods.
No problem, after playing FE7, you could try FE6, which is the sequel-prequel of FE7 (The plotline is, FE7 then FE6, like Valkyrie Profile case), is a little bit harder, but is a GBA game, so you can play it on your cellphone too, have a nice day