We run these currently. They just happened to come with the racks at our colo.
But so far they have been pretty good. They also talk SNMP so you can get power draw, a disconnect or power, and other stats into your monitoring system.
https://www.amazon.com/APC-AP8841-Metered-Output-Connections/dp/B003ZMU2HG/ref=sr_1_fkmr1_3?s=electronics&ie=UTF8&qid=1533412579&sr=1-3-fkmr1&keywords=apc+rack+managed+pdu