[Professor P]

Thanks, Mike for your comprehensive and almost instantaneous reply.  I will also note that your legendary responsiveness as the developer of the app was a MAJOR selling point for MSP.    Thanks, too, to Lester and Lawrie for their encouragement and advice.   I probably have only one or two outdoor gigs a year, so I'm not sure how critical an issue that would be.  Sitting at the keys, I could always have paper backup if I needed it.  That said, Mike also mentioned the 4:3 aspect ratio of the BOOX, which - like the I-Pad models - makes it particularly efficient for displaying single sheets of music.   I have never explored E-ink, though, so will have to do a little research... 

Happy to be part of the MSP Community !  I'm sure I'll have lots more questions going forward...

-P