We are looking at some SNMP power monitors, and the WattNode devices from Continental Control Systems (http://www.ccontrolsys.com/products/wattnode_modbus.html) seem to fit the bill. (At least when mated to something like an iBoard2 from Control Solutions (http://www.csimn.com/CSI_pages/iboard2WN.html) I was wondering if anybody had different suggestions? The iBoard2 at $450 isn't awful, especially as it is supposed to be able to handle several of the WattNode sensors. The WattNode sensors at $350 each though add up quickly since you need one WattNode for each three phase circuit you are monitoring. Oh, and is there a reason to not get the split core transformers? They seem to be a bit less accurate, but having to replace a solid core transformer would be really intrusive.