Found my copy of Golden Sun.

[Myak-04]

I was searching for art supplies in my cupboard today and instead I found my long lost copy of Golden Sun. I've been playing it all afternoon... I forgot how incredible this game is :D . 

Apart from my excitement of finding golden sun, I also have a question. I've never played Golden Sun: Lost Ages, because I could never find a copy, can anybody tell me if it's worth hunting down? Also, is it necessary to finish it before the 3rd one comes out?  

Thanks :D .