iPad mini was developed for internet PRON as it keeps the other hand free 😀 😛
Really it depends on what you want, I have an iPad 3 but I'm actually going to move to an iPad mini (so some would argue a step down) but I find I primarily use my iPad in bed for reading each night, for sending app content to my appleTV via AirPlay and I think the smaller size and less weight will be more beneficial than the retina display (which is fabulous and I will miss) on the iPad 3.
I must admit was tempted by the 2x speed claims and 2x graphics of the A6x processor on the iPad 4, but then thought about it and realised that my iPad 3 never seems sluggish or slow so maybe I don't need more speed either right now, plus I have the A6 in my iPhone 5 anyway.
Either way I'm sure you'll enjoy your new iPad 🙂. Just hope it's for longer than the 6 months before we see another refresh...