When they come out with one, Seidio's Innocase Surface, as it is for other devices, will be the best option. I've tried all sorts of cases on all sorts of devices and for a sliding/tilting device like this I've never seen anything better in enhanced grip, durability, protection, fitment, and size. Plus their matching holsters are the best around. Extremely highly recommended. Should be $50 for a case+holster and $30 for the case only. I can't tell you how many times it saved my Titan.
http://www.seidio.com
emailed them to today to see if I can get an ETA.