You can also go with Turnigy Nanotech 25C 4000 mah packs.  They have enough juice to fly the new Masters pattern with about 1000 mah left after the flight.  They deliver good power and come out of the plane cool.  CA Models Genesis, Dual Sky 6360-12 Motor, 55 amps at full power.  These are 100amp continuous discharge batteries so they don't have to work hard.

The biggest problem is catching them in stock at HK.  BTW, the higher discharge Nanotechs are alot heavier and cost more. 


Rob