I have a 13" MBA 2011 w/ lion,just got it after years on a dell Inspiron 1545. It is amazing. Incredibly light, With really really good battery life. So need for an iPad, I have no qualms about carrying it with me, it doesn't weigh that much more than large book. It can power down, restart and be back on my desktop in 15 seconds. Backlit keyboard is great, don't underestimate it for late night projects. Also, I now have nothing on my desktop, Osx file systems are muchore intuitive and multi task orientated. Get an MBA, it's more money but better value than anything else on the market.