I do mainly admin work using Office programs, Quickbooks, etc. I have an iMac that I use daily, but am looking to purchase a Macbook Pro for portability since my iPad isn't cutting it for what I need. I am trying to decide between the new low end 13" without touchbar or purchasing a refurbished 2015 or 2016. I will be using it for several years, so am a little concerned about going with the 2015. Any input would be appreciated.