I've recommended the Linx 1010 many times and am still very happy with mine. £145 on Amazon with a physical keyboard attachment included.
http://www.amazon.co.uk/gp/product/B014D847FS
It is an excellent tablet. It runs full Windows 10 so you can run Windows apps and full Windows PC programs. In tablet mode it makes the buttons big and easy to use, apps full screen etc while in desktop mode it runs like any other PC. Personally I use it in desktop mode all the time as a tablet and only use the physical keyboard when I'm away from home and going to be doing a lot of typing. The keyboard makes a good screen cover but it is heavy.
It has three USB ports, 2 full size and 1 micro, a micro SD card slot so you can easily add another 64 or 128 gb of storage. Plays movies great though the speakers are not that powerful.
For surfing the net I use Chrome, which has touch gestures like you swipe right to go back a page and so on. Facebook, Twitter etc have their own Windows apps of you can just use Chrome, Firefox, Edge etc.
If you want to do some work you have the Word, Excel, Onenote, Powerpoint etc apps or you can of course install the full PC version.
You can also, as with any PC, have separate user accounts so several people can share it while keeping their own settings, flies etc private. Useful for kids since you can let them use it without them being able to read your emails or buy stuff from the app store. If you already have a PC with a microsoft account you just use the same account and it will automatically bring over all your settings.