Hello, i'm trying to make a DIY drone at lest equivalent to DJI Phantom in performance but cheaper, will be used with GoPro hero2.

I'm total noob in drone and UAV domain, but i can handle with electronic circuits, soldering and other electronic stuff.

For the moment in my shopping list are:

3DR ArduCopter Quad-C Frame  http://store.3drobotics.com/products/3dr-arducopter-quad-c-frame-kit-1

APM 2.6+ Assembled (Cables enter from top) - $150.00 

APM Power Module with XT60 Connectors - $0.00 

3DR GPS uBlox LEA-6 with Compass - $79.99 

APC Propeller set 11X47 SFP Style - $0.00 

Motor AC2836-358 880Kv - $6.00 

Of course, i want the drone to stay in air as much as posible, please advise me what battery should i buy.

Any advices are welcome, thank you.