Although I started with Insteon, I now primarily look at z-wave solutions. Just be aware that multichannel devices will not work if you are running 'official' v4.5.x software. Multichannel is supported in v5(in alpha), and UDI is commited to z-wave, however the implementation is ongoing. I have several z-wave devices, including a Schlage lock, Aeotec doorbell, some plug-in switches, and the older MultiSensor 6. All work in v4.5.4 that I am currently running.
Do a search on this forum before you purchase a z-wave device you are interested in. Someone may have posted compatibility information.