I feel like iPad Pro 9.7" is not substantially better than iPad Air 2 though... the key thing is keyboard and I already have a great Logitech Keyboard Type+ Case and Keys to Go. Only thing lacking is stylus/pen but unless this is a must have for you, there is little incentive to upgrade. If I was buying a new iPad though, I'd get the Pro 9.7".
The larger Pro however is still a bit awkward to me but that's how we once felt about 5" phones at one stage. Makes a great BYOD with Office 365 though if you want something to work with and you can't BYO laptop.