Looking to purchase a MacBook Air, 13" model. Its gonna be a secondary machine as I have a 5K iMac for all the grunt work. Two options I'm looking at are as follows; From Apple Refurb Store: March 2015 Model i5 1.6GHz 4GB RAM 256GB SSD Intel HD Graphics 6000 http://www.apple.com/uk/shop/produc...nch-macbook-air-16ghz-dual-core-intel-core-i5 £850 From Hoxton Macs (Refurb Store): Mid 2013 Model i7 1.7GHz 8GB RAM 256GB SSD (512GB option available for extra £100) Intel HD Graphics 5000 http://www.hoxtonmacs.co.uk/collect...-inch-i7-1-7ghz-mid-2013a?contact_posted=true £780 (£880 for 512GB SSD) Looking more at what they are capable of. Also looking at a retina MacBook which is about the same price, but preferring an Air currently. Any advice on any of the three gratefully received.