I agree with filejw. The other responders don't understand the dynamics of airline hiring in the United States.. If you ever want to work for a major in the States you will need 1000 hours PIC. You will not get that for many years if you take a job with EVA/China Airlines. If you have other ambitions then the move might be right for you. Then again, if you are still an F.O. at a regional in the States there isn't any guarantee that you will upgrade. It would depend on which airline you are working for and your present seniority. A move to EVA/China Airlines might be a good stepping stone to someplace like Cathay, Dragonair, Emirates, Etihad, etc.
TP