George,
but a glimpse into what the future will hold.
Unfortunately, avionics are a moving target. It seems that there is always something coming that you would like to have, but it is often months or years out on the horizon.
I did look at the SAGEM EFIS as used in the 206/407/ASTAR. This seems to be a display rather than an integrated system like the Chelton, which incorporates an FMS, TAWS, synthetic vision, and other features within the Chelton system, and it is the only such system offered as a factory install in the Enstrom 480B. No STC yet for the SAGEM, and I would guess the cost of the SAGEM with the additional equipment to duplicate the Chelton functionality would be considerably greater. However, the larger SAGEM displays are nice.