Aye, a cracking bit of kit.
You say "cheap one"... is that the one without a keyboard? To be honest any one would do. Mine has a keyboard but I don't see it as a necessity - in fact I never use the keyboard!
The big difference that I can see is the new (no keyboard) models have no audiobook capability. No biggie if you don't want to listen to them, but I like to put a bit of music on mine so I can listen to my sounds while reading a book