Hi, i have done 90 percent of my professional work on a 384back, no color screen but mostly tethered in studio. If you mostly wok in a square format, the 384 is the back to go. Unlike the H25 it can be perfectly used on location. I have used it in helicopters, nuclear power plants, high up in power line towers etc. I never bothered about the image bank, it is a fast and safe storage.
if you mostly use rectangular images, and only want to use the back in studio; go H25.