Bill, I like to experiment with this stuff so I bought a Hannspree 13.3 android from Amazon to see if it would work for me.
http://www.amazon.com/gp/product/B00FA9ACIG/ref=ox_ya_os_product_refresh_T1 Had problems from the start with the power button. It would take several tries to turn the unit on and off. It did a good job of lead sheet display and was much better than the Music Pad. I used Adobe reader for the display of PDF sheets (still trying to decide on an android app for music display). Battery life was about 3 1/2 hours. I liked the fact that there were two miniature USB ports and used one for wireless mouse and keyboard during editing stuff. After about a half a day of frustration with the power switch, I decided to return the tablet. I did contact tech support for the tablet and was very impressed with the response from them. There was no wait time for tech support.
I have ordered an 13.3" Archos FamilyPad 2, 8 GB Tablet.
http://www.amazon.com/dp/B00B6V5Z70/ref=pe_385040_30332200_TE_itemIt is a little cheaper than the Hannspree unit. Was impressed with some of the customer reviews. Specs were about the same as the Hannspree except for battery life. Battery life is reported to be over 6 hours. Will let you know how this works out.