Originally Posted by Afrodium
Thanks for the advice. I shouldn't have too much of a problem if I can keep the current and previous issue on the device. Though I have to ask how 100-200mb games like Device 6 and Year Walk end up taking up almost a gig of space. I've been looking up sizes of apps I'd download to calculate how quickly my iPad would fill up, but I completely forgot about the extra data they store. That picture is making me think that I may go for a 32gb Mini Retina.
It's not a matter of extra data. What you see on the AppStore is the compressed size of the app that gets downloaded. Once installed, most apps tend to occupy a lot more space after decompression. For instance, The World Ends With You balloons from 600mb to 2.4GB when installed.
If you want to know the installed size of apps, check out the OP of the neogaf iOS gaming thread. If you don't find the app you're looking for, search for its corresponding thread at the touch arcade forums.