FWIW... My choice and major tool now is Samsung Galaxy S3, 8-inch tab. $279.
Mine is not a phone...but you can install Magic Jack and it becomes a phone anywhere you have WiFi access.

When gigging it sits atop my KB with lyrics when I need 'em, MP3s when needed. I guess I could play my SMF there to, but I put them in my KB.

All my computer repair files are on it with all clients' info, plus calendars, photos, etc., etc., etc.

Moving files to and from a pc is also ez-pz.

JMO.

Eddie