I've got 2 older (3 yrs) GY-HM700's and use them to shoot mostly at HD 720 x 1280. I'm looking to add a 3rd camera and the JVC GY-HM710 appears to be the next edition of the 700, but the specs appear to NOT include HD at 720?? (just 1080 and SD?) Is that just an omission in the specs?? If it's true, is there a way to modify the OS to include 720?