Greetings, Picked up my first Apple computer, mid-level 2013 21.5" iMac with the 2.7ghz quad core and wondering if I should spend a bit more and upgrade to the 2015 with the similar specs for ~$95. I am a very casual user. Web browsing with occasional video watching mixed in. Wife does the same, plus some light photo and video editing. Is the updated processor, Thunderbolt 2 ports, and new mouse and keyboard even worth the small amount it will cost me to upgrade? Resale might also be a plus if we decide to upgrade down the line. Thanks!