In reply to Doug:
I don't believe there is an alternative without significant compromise. Yes I'm a complete 11" MBA devotee !
Get rid of the iMac at home, get a monitor, ideally Thunderbolt but lots of cheaper options and use your MBA alone for travel and desk
I bought my current MBA early 2014 on eBay, hardly used and works perfectly, go for the 4MB 256gb model or greater.
I'm not convinced about the new one port models, but I'm sure we'll get there...
Post edited at 20:42