Time for HA, finally. Thinking Insteon. Mulling this for 20 years. What is best?

["Greg" <gharrison2@xxxxxxxxxx>]

was waiting for CeBus, but that petered out. Meanwhile X10 kept going,
and going.  Then this Insteon system popped up, with the Powerlinc
controller that does not require an always-on PC.  Could do the PC, but
maybe that powerlinc is good enough.  What do you suggest?

Goals:

lighting control, mainly
fluorescent and incandescent, eventual LED
hot water heater
GUI, but downloadable to a controller
Reliable across phases, low susceptibility to powerline noise
Not susceptible to external signals, nor emanating to other homes
As reliable as a plug-in light timer
Randoming
Responsive to sensor signals
Time of day/available sunlight ephemeris
Longevity for good future expansion

There are a few desired capabilities.  How would you satisfy them?
X10, Insteon, something else?

Thanks.