I have a 2013 13" MacBook Air (Haswell) that I absolutely love to bits, by far my favorite computer ever (including my MacPro). However it is a little under-powered for Mainstage, and while Omnisphere in VSTLord yields surprisingly good results (CPU usage rarely more than 30%), I need Mainstage's flexibility for live use. I'm not ready to pull the trigger quite yet, but I really prefer the MBA's form factor over the MacBook Pro. So I started comparing the two, and whaddayaknow, a tricked-out MBA costs $1749, that means the i7-5650U with 8GB RAM and 512GB storage. A comparable 13" rMBP would be the stock 2.9GHz/8GB/512GB at $1799, which has the i5-5287U. Now I know the processors in the MBA's are energy-savers, not really meant to do prolonged heavy-duty work, but seeing how close my current Air is, I wondered if the i7-5650U would suffice for live use? On a deeper level, I would like to understand better what exactly the differences are between these CPU's? Is the i5-5287U really more of a workhorse processor? Both are dual-core only, the quad-cores are reserved for the 15" rMBP's, unfortunately. Thanks. [edit:] Apart from clock speed and graphics, it looks like the i7 is actually a better processor: http://cpu.userbenchmark.com/Compare...m26818vsm25610 Since the MBA doesn't have a retina display, I doubt graphics performance is much of an issue. Which leaves clock speed as the determining factor?