I know you said you don't want 3D but the majority of helis i seen on youtube with the video camera attached have been 3D type heli's i'm looking at getting a trex 450 clone and from what i seen on youtube 450's handle the style of camera i'm getting pretty well.
i've seen videos of the trex 500 using a camera too.Just because its a 3D heli it doesn't mean have to do 3Dmaneuvers with it.