If you want to see the Omen and Recount Meters then you need to install them along with the nUI plugin that supports them.
http://wow.curse.com/downloads/wow-a...eat-meter.aspx
http://wow.curse.com/downloads/wow-a...s/recount.aspx
http://www.wowinterface.com/download...nfopanels.html
Or, you can do one better and get Skada. It handles threat, dps, damage, heals and other meters all in one addon, and you don't need a plugin for nUI to make it work. This seems to be the new and upcoming more popular meter right now.
http://www.wowinterface.com/download...mageMeter.html