the 11" mba is not portable like the ipad mini.Or you could skip the iPad altogether and get an 11" Air + 24" IPS monitor. You can get that for around 780$. On another note, from your OP, the 2014 MBA only has a 0.1GHz processor bump. There is no reason to get it above the 2013 model.
Best,
Matt
Bizarely the mba 2013 costs more here than the 2014.
But if the OP can get the 2013 cheaper, there is no reason to get the 2014.