There are several websites/tools that give you the price for a selection of many frequent flyer programs based on your given route/class combination. This FM post reviews some of the major ones:
http://frequentmiler.boardingarea.co...-study-part-1/

These tools aren't always 100% accurate, but they're a good place to start!

As for Asia, Alaska miles are some of the cheapest and their partner Cathay Pacific has relatively good award availability in J/F if you're booking far out (11 months) or close in (within 2 weeks). ANA is also good and has same availability as United, but ANA does collect fuel surcharges if the airline you're flying on charges them. AA's prices aren't bad either, and they partner with Cathay and JAL.