Here’s a video by MidwestRob taking is QAV400 out for a spin at Lone Elm Park in Kansas. One thing I like about his videos (other then his amazing flying) is that he puts a lot of good info about is builds in his video descriptions.
Here’s everything he’s flying with:

Frame: QAV400 w/ CF Landing Gear by
Flight Controller: OpenPilot CC3D
Motors: Tiger MT2216 1100kv
ESC’s: 30A SimonK ESC
Props: Custom 8×5 Graupner “Bullnose” by
Battery: Sky Lipo 4s 3300mah 40C
RC TX / RX: 2.4 GHz Hitec Aurora 9 / Optima 7 w/ Batt. Telemetry
Voltage Regulator: RangeVideo Filtered Linear Power Supply

Cameras: 600TVL SONY Super HAD CCD D-WDR / GoPro Hero2
A/V TX: RangeVideo 1.28GHz 600mW TX w/ Low Pass Filter
A/V RX: 2x Lawmate 8ch RX
Diversity Controller: Eagle Tree EagleEyes
Antennas: 1.28 GHz 8dBi Patch, 6dBi and 3dBi Omni Whip
Displays: FatShark Dominator Video Goggles and 7″ LCD Monitor
OSD: HobbyKing E-OSD