[quote name='q 3']I'd second that. Also note that Front Mission 1 is coming to the DS in October, with a bunch of new content that wasn't in the original version. Front Mission 3 is also tops.[/QUOTE]Thirding! Front Mission needs more love. FM5 never left Japan *shakes fist at Squeenix*, but there's FM3 for the PS1, FM4 for PS2, and the upcoming DS port of the first game in the series. They're sci-fi mech games that take place in a future Earth, a very different setting from your typical SRPG. One unique aspect of the series is that each unit has four sets of HP, one for each Wanzer (mech) part.
Nippon Ichi's SRPGs tend to be good, but Phantom Brave and Makai Kingdom both use this weird "grid free" system that annoys the hell out of me. La Pucelle and Disgaea are the ones from that company I've enjoyed the most. They are genuinely funny, charming games, and the gameplay aspects are quite good. If you want to play both, I suggest La Pucelle first, as it's not quite as busy and overwhelming as Disgaea.
Final Fantasy Tactics and Final Fantasy Tactics Advance are both work picking up, but in certain ways, they're very different from each other. FFT is heavier on story and strategy; FFTA has a ton of side missions and works very well as a portable game in that it can be played in short spurts. Both have deep and extensive job systems, though FFTA's is a touch more complicated as there's five different races, each with their own set of jobs.