I intend shortly to make a documentary film. I have reasonably decent camera (sony XR520VE) but the sound on it is not good. I've a Rode StereoVideoMic, which is not bad either, although it picks up a lot of external noise - impossible to have it attached to the camera. Anyway. At the same time, I want to buy a new digital voice recorder. It occurred to me that I could invest in a good quality one and use it both for voice recording (interviews) and for independent sound for video. In the latter case there would presumably be the two options of either using it entirely independently (ie using it something like a wireless mic) and bringing the sound in at the editing stage, or plugging it in to the camera as an external mic. Any suggestions? Is this a good idea? Or not at all? If so, what sort of recorder? The top Olympus and Sony models seem to have good reviews. Thanks.