Hey Mark,
Couple points regarding the Gates and Amphibico monitors.
Both of these monitors specifications are identical in screen resolution and both can accept a component HD signal. Amphibico labels their monitor ‘HD’ because it accepts an HD signal. Gates, on the other hand, labels their monitor ‘Hi Res’ based on the screen resolution, which is *** Total Dot Count: 392K (1440 x 272 R+B+G) ***.
1440 x 272 is neither 1280 x 720 or 1920 x 1080 – the two HD standards.
There is a significant difference in battery life between the two monitors. Amphibico specifications state ‘up to 4.5 hours’.
The Gates EM43 will run 10-20 hours depending on the type of battery used. I have personally used my EM43 for entire weekends (7 dives with one hr or more downtimes each) worth of diving without having to change batteries.
The Gates has full auto-sense of power and signal format. There are no switches or controls. Adjustments to color, brightness and hue are done once to match the camera display, and accessible with the battery cover off.
The Amphibico monitor is also auto-sensing (NTSC/PAL) but accesses the brightness settings via external controls on the monitor. This is more than likely what causes the difference in run times.
I am not sure about the Amphibico housing, but I do know that the Gates EM43 can accept 720 24/25/30/50/60 and 1080 24/25/30/50/60 -- all the common NTSC/PAL, resolution and frame rate formats in use. This is very important when shooting with different cameras or one like the PMW-EX1 which outputs the same format being recorded.