I have finally found a tablet big enough to see my sheet music without breaking the bank and being tied to Apple to manage files. I connected my mini USB cable from the tablet to my pc and VOILA, hundreds of my PDFs are in the Tron Tab Mega. I installed Mobilesheets to manage set lists etc.

http://td-semi.com/tron-tab-mega-16gb-wifi-tabl16.html

And, it is a full fledged Android to boot. For $200 you can't beat it.
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pa4X 76 ,SX900, Hammond SK1, Ketron SD40,Ketron Event X Centerpoint Space Station, Bose compact