I need to connect to my home's power "Control Panel" / Breaker box that operates on Zigbee to check energy usage information. But I also want to interface with Zwave and Insteon products. Is this possible with only one expansion slot on the ISY994i? I also bought a Homeseer USB stick for Z-wave, so perhaps I can just use that for Z-wave products? I really want to use ISY to control everything as I've heard it's extremely reliable, any recommendations? I want ISY to be the backbone of all control. I'll be buying today if I get the answers I need, thanks!