In reply to Frank the Husky:
Ah... just checked out the Double Horse Volitation. I suspect It'd make a terrible filming platform though, far too much vibration, high speed tail wag and generally not easy to fly.
A multi-rotor (quad or hex) platform will generally make a much better camera platform unless you already have good flying skills, need to go fast and want to fly aerobatic maneuvers in which case a properly adapted traditional heli is best.
Personally (and I do have a couple somewhat bigger) I'd get a traditional single rotor + tail heli with full collective/cyclic control, ~18" rotor span, something like:
http://www.fast-lad.co.uk/store/index.php?cPath=21_134_409_219&sort=1a&...
Invest in some nice radio for it and enjoy learning to fly a reliable machine that does exactly as you command, no computers or glitchy radio gear to blame when it goes wrong. Batteries and crash parts are cheap ish in this size and as they store less energy in the rotor head they are a little safer more forgiving of bad landings then their bigger brethren.
As I said before, it really depends what you actually want.
jk