I'm having trouble finding if the D7000 can support SDHC UHS-I cards. There's so many different specs out there right now between read/write speed, class, and SD-whatever, it's hard to tell.
Jdeg, see page 319 of the users manual, sub note 2 & 3. The camera will support SDHC UHS-l as well as SDXC UHS-l. They also recommend class 6 or faster for video. A slower card may suddenly quit.