Hi, I'm debating what iPhone to buy: 6 or 6s. For me, the difference between the two would be around $350. My goal is to get a phone that I can enjoy for at least two years. By saying enjoy, I mean not experience a huge performance drop in terms of speed and avoid drastic lagging. For instance, I find iPhone 5s quite satisfactory for today's time; iPhone 4s/5 however are too slow for my liking. I do understand that the performance will be surely also affected by future iOS updates, while it is a common occurrence that older iPhones are not friendly to new iOS releases. lol I find a $350 investment into a 6s "tock" iPhone to be really substantial personally. To be honest, I don't need to have the new 3d Touch or Live Photos features. However, spending the extra $350 will be worth it if it means that I can better "futureproof" my phone and possibly resale it in 2-3 years at a better value. I guess I'm more concerned if the inclusion of 2gb RAM or the A9 chip in the iPhone 6s and its effect on "futureproofness" compared to the iPhone 6. I realize that there is no clear answer, but would still like to ask the community for recommendations. Thanks.