I am on the fence between these two Macbooks. I can get the 2015 Air, 8gb ram, 128gb for $700 new or do I get the 2015 MBP Retina, 2.7ghz, 8gb ram, 128gb refurbished from Apple for $929. Is the retina display that much different than the Airs screen? Is it worth the $230 or so difference? I will only use this for browsing, pictures, spreadsheets, etc.I won't be traveling with it much at all. Any help in deciding would be appreciated.