In a properly insulated small box, any of the small systems can keep your stuff cool for less than 50 amps a day...which means a hundred amps of planned battery capacity. If you have this to spare or can add it, then you should be OK with any of the major systems. Having owned a system which was either air or water cooled, I found no difference in amp usage,,,the water cooling ran less but used more amps while running due to the
pump. The air cooling ran a lot but at 5 amps less draw. The main thing I think on a new installation is to make sure your box is very well insulated. Good luck!