Personally waiting for the Retina Mini. Went to check out the iPad Air and wasn't impressed with the weight enough to change my mind from the Mini. Yes it's lighter than my iPad 2 that I sold couple weeks ago but it still feels like someone just ripped a small notebook screen off and started using it as a tablet, just slightly too big. I think I've just gotten really comfortable with using the girlfriends Mini over the last few weeks.
Mini to me just feels right, sort of like how a 13" MacBook is the sweet spot for me compared to the Air feeling like a 15" MacBook.