At the start of the year I had a 13" retina launch model, 8GB Ram with 128GB SSD. As a primary machine it was "average", some screen tearing at 1680 resolution, so I had it at 1440x900 all the time. The lack of SSD space killed me as a primary machine, so I sold it for £800 UK (Great price!) and picked up a latest spec Mac Mini 2.3 Ghz Quad Core, 1TB HDD and threw in 16GB RAM, all for £530 (which I feel is an awesome price for the UK market). Paired it up to a 32" Samsung UEf5000 Monitor at only 1080p but the real estate is excellent. Geekbench score around 12,000 and always have Windows 7 open in Parallels. Performance is perfect. My intention was to sell the Mini in early 2015 with the new Macbooks for Intels real spec bump. I use Revit all the time, sketchup, CAD, code, game development using UE3 (would like to use UE4 but not rocked the boat and tested my Mini as I presume performance will be awful), create ibooks and technical manuals, with 1080p videos and help create training plans, etc. so work is varied. Now the bad part.....complete lack of portability! As I have changed jobs I want/need to be portable for work, now, not in 2015! However it is only portable for Home to various offices, no working in coffee shops (!) - so I suppose I could transport the Mini? To get the same set-up I have with a rMBP 15 I'd be looking at around £1500 for the base, with the 1TB SSD storage nearly £2100! Now I picked up a refurbished MBA 2013 base model, 4GB RAM, 128GB SSD for £679. Originally for my partner to have, she doesn't need it for a few weeks so I partitioned the machine, 64GB to windows through bootcamp and 64GB for Mac OS. Tried Revit and it flies up to a 'simple' model of around 150mb, battery life in bootcamp 5-7 hours, in Mac OS around 10 hours. Everything plugged in via external so I have all my files on the go. It's awesome, weight wise it's fantastic, battery amazing, screen glare is minimal and I prefer the bezel to the rMBP 13. I do not want to give it back!! Overall I wish we were 5 years ahead in time and it had the complete level of performance I need now! Now here's the question - have I stumbled into the perfect solution, 'beefy' desktop and 'base' portable, or should I throw my eggs into the one basket, sell the Mini, Screen plus peripherals and just go the 15 retina route?! I feel that a £1500 laptop I'd watch like a hawk and be precious, where as a £679 MBA is almost consumable (to some extent), plus I would still need external storage as I have around 700GB of files. The other option is to find a good priced 2012 classic 15 and tool it up to the Mac Mini's spec?! Costs: Mac Mini 16GB 1TB £530 (already own) + MBA 4GB 128GB £679 (refurb) = £1109 rMBP 15 16GB 512GB = £1783 2012 cMBP 15 on ebay = £750-900 I'm fully aware the mac route isn't the best for the Revit work but I do prefer Macs.