For practicing I have an ipad with an app called Forscore, it does a great job of organizing my pdf sheet music and syncs with Dropbox. It is also compatible with the Airturn foot pedal sheet music turning device. I've been using this setup and really like it.
I have an android phone and am thinking about getting a Nexus 7 to bring around with me, I found a great deal on refurbished ones. I'm trying to find a similar app to Forscore for the android that i can use either on my phone or tablet.
What are you guys using?
The Nexus 8 is coming out in April, btw.