OK, I bit the bullet and got a Centralite LiteJet. It came in last Friday.
I got the panel installed Saturday, and connected 6 20A circuits to feed power to the system.
Sunday, I connected a couple of loads (lights) to the system, and ran a couple of CAT5 wires to switch locations. I then connected a laptop to the serial port and ran the LiteJet software to configure the lights, switches and a couple of test scenes.
Yesterday, I connect my Elk to the Centralite.
Everything is working great so far. I still have some testing to do, but so far I am very happy with the results. I had originally gone down the Insteon path, which was a PITA in my opinion.
NOTE: This is not a system that is easy to retrofit. I am in the middle of a major remodel, including new romex, so this was an easier choice.
I will report more later...