iPad mini or MacBook Air ?

So I'm an Apple fan. I'm not afraid to admit that. I love other products too, but nothing matches the quality of Apple made products in my opinion. My current set-up is an iPhone 4, iPad 2 and Fujitsu Lifebook running Windows 7.

Currently, I'm considering selling my iPad 2 to buy an iPad mini, as the smaller form factor is much more convenient for me. However, I had another idea. I've wanted a Mac for a long time but have never been able to afford one. My theory is, if I sold my iPad 2 and my laptop, I may possibly have nearly enough to get a 64GB 11" MacBook Air.

Do you think the MacBook Air could sufficiently replace both my laptop and iPad in terms of convenience and also desktop computing needs ?