My stepmother is looking to buy a new iPad to replace her ancient iPad 2, but she is unwilling to buy a new one, she wants to save as much money as possible. She mostly uses it for watching TV shows and paying bills online. Ideally I would recommend the newest, but since she seems unwilling to do this, I was curious which refurb would be best. I was look at the 5th-7th generation online, and I don't see much difference between the three for someone with such light usage. Any reason to go for a 6th or 7th generation over the 5th in this situation? Any notable differences between the three that would make an impact?