My Samsung Galaxy Tab 10.1 (without 3G) works also very well with Irealb. Only once I had a problem, that the IrealB app asked for Internet for a senseless update or whatever and then it didnīt start - but this is some months ago. Now on Android 4 it works also very well.
On such a 10" Tab you could also display PDFs as Leadsheets, the only thing when live playing is: to scroll to a 2nd page is quite slow. I think the PDF readers should be improved, to display 2 Pages in parallel (10" wide).