Hi. I just bought a new Canon EOS 5DIII and am setting it up for video. I want to do some short nature/wildlife video clips and capture the ambient sound as best possible. My two choices would be to use either a Sony PCM-D1 and use it's internal mic, or a Marantz PMD661 with a Audio-Technica BP4025 External Mic. For headphones it would be either the Sony MDR-7520 or Sennheiser HD 25-1 II. Any comments on the Sony/Marantz-AudioTechnica comparison?