IF you are in the market for a new MacBook, Mac World just put out this brief guide that reviews the differences between the different MacBook models.
http://www.macworld.com/article/3200690/macbook/which-macbook-should-you-buy.html?idg_eid=c9365e789fc8a8e6e3d72266a6c6fb5a&email_SHA1_lc=2c0e15d9ba33b98800fdc2b3c9dda01f6068913e&cid=mw_nlt_mw_daily_html_2017-06-15&utm_source=Sailthru&utm_medium=email&utm_campaign=Macworld%20Daily%202017-06-15&utm_term=mw_daily_html