Get Tactics Ogre, The Knight of Lodis. Same game engine as FFTA, minus the bad story, stupid add-ins like laws, and other taint SE gives game.
Man that game is cool, and has a GOOD storyline in MY opinion. And the laws put in a diff element which could be to your advantage/disadvantage. Example: Can't attack humans law, and your whole team is made up of humans.
Get Tactics Ogre, The Knight of Lodis. Same game engine as FFTA, minus the bad story, stupid add-ins like laws, and other taint SE gives game. Also, it's made by the company that worked on the first FFT for Square (they didnt work on FFTA from what I read).
Get the Phantasy Star collection. Several old, decent RPGs, and they're all a good 20-30 hours or so of playtime.
Legend of Zelda the minnish cap (just a downright good game)
Fire Emblem-tactical style game, like Shining force (also a decent game they rereleased for gba) but slightly better.
Also Megaman Zero 1-3 are all good games. Slightly harder than the MM or MMX games though, but still a good challenge.