Diversity should not mean each year or so getting a different school bus video system. Notice the "SW" decal that they added when they purchased the SW system on the left. then see the REI camera before we junked it and added our system. that makes at least 3 different systems int this one bus. For most applications of school bus cameras, digital bus video cameras, vehicle camera, mobile video surveillance systems, digital in-car video camera, in-car camera, bus camera surveillance the best value is 100% Solid State digital like the SD4m series due to their tiny size and footprint.