I have the mini with 64gb and wifi only.

I've used about 18gb of that space with 315 songs, 2 audiobooks,
1 movie, couple of Kindle books and a bunch of apps so far.

For me the mini is a great size as I take it with me on trips primarily
for entertainment. For me, it beats the Kindle in that it offers me a
variety of entertainment options for not that much bigger a package.