If you're looking for depth in your battle system, I have to say Bravely Default. It takes a classic, beat to death FF job system and breathes a bit of life into it. I personally found it to be overdone, and I couldn't really get into the combat or the FFDS chibi visuals, but the music was decent and the battle system does what it aims to do pretty well. I only played the demo, which wasn't enough to encourage me to buy the game. If I end up with an opening in my Gamefly queue I'll probably give it another shot.
Fire Emblem simplified the battle system even while adding a couple new mechanics, although the maps are too open and rarely present a need for tactical thinking or formations, at least in my opinion. The visuals and music are top-notch, though, even if the character models are lacking feet. Plenty of bonus content too, both paid and free, and callbacks of all sorts to older FE games, related or not. I really enjoyed it, although you can probably see my bias pretty easily, and despite looking dumbed-down, the higher difficulty modes can be a real challenge.