I can't recommend Rogue Galaxy. I just did not find the game to be very enjoyable. I thought the loading times were amazing and the battle system was really cool, but I despised the story, the characters, and almost everything else in between. If you like action RPGs, I'd give it a try, but other than that, you might be disappointed if you're looking for a stellar story.
If you've never played a Dragon Quest game, then you owe it to yourself to play DQVIII. It's a great game, and challenging, too. Valkyrie Profile was good, too, if you don't mind getting your ass kicked. Be prepared to use your brain if you play that game.
I'm in the market for a good RPG myself, but I seem to have played everything. My options are limited these days...and there's no hope on the horizon, either.
Jam it back in, in the dark.