Hello all!  I'm currently using the 12x45 EPP props on my quad, along with the 880kv motors.  I'm only getting 10 minutes flight time with a 5000 mAh battery, and I'm hoping to stretch that time to past 15 minutes.  I'm already ordering a 6400 mAh battery that is a tad lighter, so that should help.  

What I was wondering is, can anyone recommend better props for this setup?  I've heard that better props can improve your flight time.  I guess I could also upgrade the motors, but that would be more difficult for me.

Any help is greatly appreciated!