Originally Posted by BlondeBomber

AC is updating its cabins on international J so you likely will be happy with that choice. UA offers more upgrades than AC now (AC used to give out 2 System wides every 10K qualifying miles, now it is more like every 20K, only good on higher fares, Special system wides, good on low fares, are harder to come by--you get two instead of the regular SWU certificates at 45 (if you are in top tier SuperElite only), 75 K, 120K qualifying miles. Since you don't want to connect through UK or US, it does limit you pretty much to AC and SQ and LH if you want to maximize benefits.

As others have noted, decide what you want out of the program. If you are not in top tier Super elite, rewards on AC metal can be hard to come by at regular mileage award levels (but you have access to other Star Alliance reward inventory like you would with their respective programs).

If you fly in business or first, Miles and More is a very attractive program. If you are not interested in upgrades, BMI's program also offers some interesting advantages even if you don't fly BMI much. Check out the comparison chart below.