A total bias vote given that I've only played one, but Star Ocean 3 wasn't too bad. If you've played the one for the PSX, it's about the same thing with the few changes as you'd understand. Teams of three now, some skills use HP instead of MP (and hitting MP 0 kills you), and they've changed the PA system too I think. It's been a long while since I've played mind you.
I know SO3 is $20 since I bought it at that price a few years ago, but RG might be that cheap now, I don't know.