Q: iPad Air, or iPad mini retina?

Go to the iPad page from the topic bar above and compare the tech specs of the two.  The Air is going to be a little more powerful, but the extra screen size will be helpful for document viewing.  The cellular version helps if WiFi is not readily available.  But you do not have to subscribe unless you find it important.

iPad Air vs. Retina iPad Mini: Which tablet is right for you?

http://reviews.cnet.com/8301-31747_7-57610252-243/ipad-air-vs-retina-ipad-mini-w hich-tablet-is-right-for-you/

16GB vs 32GB vs 64GB: Which new iPad storage capacity should you get?

http://www.imore.com/2012/03/08/16gb-32gb-64gb-ipad-capacity/

How much content will fit on my iPod or iPhone?

http://support.apple.com/kb/HT1867

How Much iPad Memory Do You Need?

http://ipad.about.com/od/iPad-Tutorials/a/How-Much-iPad-Memory-Do-You-Need.htm

 Cheers, Tom

I Personally would get the mini. They are great devices. They more portable than the full sized iPads. I wouldn't waste time on cellular either unless you don't have a cell phone.

I Have an iPad mini and would never go back to a full sized ipad.

the only thing I would say is to get at least 32g so you have enough memory for docs.