My grand daughter has just got a Samsung 7" tab2 at £155 or so with £20 cash back. A 10" is about £225. A bit thicker and maybe the resolution a bit less good but very good at less than 1/2 price of a iPad.It has a USB out, can take mini SD cards,has a camera. Uses wi fi but there is a 3G version. You can get a keyboard dock to match. We are hopeful of running iTunes on it with a conversion programme and so far it seems great. Look it up on Google.
iMac Pro review