I am thinking about a trip this spring starting Boston, to Japan for a couple of weeks, then to New Zealand for a couple of weeks and back. I would use miles for part and pay for part (or pay for Economy and use miles to upgrade), depending on what was available. Also would want to get miles for the parts I paid for. Another possibility would be to take a stop in Paris and use a Round-the-world ticket. I was looking at Korean Air for the Asian/Oceania part. Or Gaurda?

Any suggestions would be appreciated.

Happy New Year!!