I'd get more than one card just in case you have issues with one. Big mistake to put all your eggs in one basket, I learned that the hard way.
just get the speed and size you need, at least twice. if you don't shoot much, 16GB should be plenty.
personal Good experiences with:
Patriot EP series UHS (64GB)
Sandisk Extreme 45mb/sec 16GB
Transcend Class 10 16GB
various MicroSD w/ adapter
personal Bad experience with:
G.Skill 64GB SDXC UHS (FF-SDXC64GN-U1) card shorted, lost 1200 pictures