@WT Sharpe, one more factor to make you go big:
From
gottabemobile.com:
At the largest storage level, iPad Air buyers pay $5.46/GB for a Wi-Fi only device and $6.24/GB for the LTE version. Compare that to $31.19/GB for the 16 LTE model and $24.94/GB for the Wi-Fi only model. The 128GB LTE iPad Air model offers the best price per GB ratio, but only a few people will really need that much storage. People who like to get a bargain but can afford a larger storage, will actually get a better deal per GB if they go big.
G