Firts of all, english is not my birth lenguage, so I'll try to expres myself as good as I can. I'm thinking to buy a MacBook Air or an iMac, but I think the iMac will last more years (maybe 6-8 years) because it has no battery as the MacBook Air, so there is no limitations in that aspect. I'm use to be no limited about the battery because I have and 8-year-old PC (HP). It is awful to use it today. It's very slow, the fan has been very noisy since the 4th year, etc, but it still works and of course there is no need for charge. So, I'm concerned about how much will last the battery of the MBA and if it is convenient to replace it once the battery is no longer useful to extend it for maybe 4 years and reach 6-8 years. Or I should go for the iMac? Thank you!