Yes, buy FF6, to me it is the BEST FF game ever made! Even though the grafix aren't good, to me they are one of the best 16-bit grafix I've ever seen! Also, try Final Fantasy Chronicals. It has 2 games: FF4 and Chrono Trigger. OK FF4 has HORRIBLE GRAFIX! I haven't played alot of it lately. However, Chrono Trigger is FANTASTIC! I find it to be the BEST RPG game ever made! It's grafix are nice too!
If you ever need any help in Chrono Trigger just ask cuz I just finished it!