iPad Mini 2
If it's the iPad mini that you're after, there's no need to get the iPad mini 4 if you don't need all that power. Plus, Apple has spent less and less energy on refreshing the iPad mini.
With that said, the iPad mini 2 is still a great tablet for those who prefer a smaller screen. It also rocks a Retina display, which was highly-anticipated feature that many users wanted for the iPad mini before the second generation rolled around.
Plus, the iPad mini 2 still has the performance available to keep up with most of the latest games, and at the very worst it will stutter a bit if you play something like Modern Combat.
That's not too shabby for a tablet that you can get for about $180.