After consideration, I'm going with the iPad Air 2. The $479 price at Staples is perfect, but I don't want to buy it now and have a better deal come out. Should I do the staples offer now or wait? Could it be discounted even more?
Go with that iPad Air 2, you get the A8 CPU, plus 2GB RAM.
I am type no this on a iPad 4 running iOS 9.2 Public Beta, it's much smoother and faster than iOS 9.1, BUT not worth spending money on at this point, the A6X is a capable CPU, yes, with a powerful GPU for its time, but it is old and 32bit, meaning you cannot even install Ad Blocking software, the ad blocking in iOS is only supported by 64bit iOS devices, stupid I know, but that's just the way it is.
The iPad Air 2 is far more future proof.
I almost got the Air 2, but have decided to spend more and get the iPad Pro LTE 128GB, keep that for 2-3years. Sometimes it's better to spend more and get much further, than to spend less only to have to upgrade much sooner.