Nillkin makes a nice bumper case that i am currently using on mine. Doesn't add too much bulk, grip is good, and doesn't cover up the back so you can show off your Nexus logo. Also fits the pocket very well as compared to my previous bulky monstrosity. Using with intelliglass pro screen protector.

I got this sexy little thing. http://www.amazon.com/gp/product/B00T2R9V7A?psc=1&redirect=true&ref_=oh_aui_detailpage_o04_s01 It is just a bumper case and feels nice. I have drop my phone while in it and it does a good job. the way it sits the back never touches anything you have it sitting on. Though it you spend a lot of time outside I would go with a close back case. Also if you opt for tempered glass you may want to choose another case it would most likely be flush.