Newbie question. My whole family uses Apple products, including two iMacs and my MacMini. I give presentations now and have suffered with Windows laptops on occasion. I would love to "keep everything Apple" and purchase a laptop to use at these presentations, likely with Keynote. I must add that, in general, I prefer desktop computers to work on. I'm not comfortable with the smaller keyboard and screens of laptops. My first idea was to seek advice about used laptops, Apple refurbished or just something off of eBay. A little scared of what I'll get, plus I want something old enough to be affordable and new enough not to be useless in a short while. My second idea, perhaps a better one, is to replace my aging MacMini (likely to be replaced in a year or so) with a NEW Apple laptop, and connect that to my Apple Thunderbolt display, and continue using a separate (full size) keyboard and track pad. The laptop just replaces the MacMini, but I can take it with me to use at the occasional presentation when needed. Is that the better plan? If you like the first idea, tell me the pitfalls to watch for with a used laptop, and maybe a model to look into. If the second idea appeals to you, I'm frankly a little unsure of the advantages or limitations of the Macbook, Macbook Pro or Macbook Air lines. If you know that my tricked out MacMini (with upgraded SSD drive) suits my normal needs well, perhaps that can guide your advice. Thanks!