I'm thinking about replacing my 27" iMac with a Macbook Air or Pro + my old 27" LED Cinema Display. I use my iMac for iTunes and podcast mostly but I'd like a computer to take with me when I travel, hence the change from a desktop to a laptop. First, is there any issue using the modern Thunderbolt equipped Macbook's with the old Display Port standard? Second I know that the Macbook Air and Macbook Pro can be upgraded (tho voiding the warranty) with a 3rd party SSD. I'm not sure but I think the Air and Pro requirements are slightly different. What M.2 key does the replacement have to be, and is it NVME or AHCI? I'd like to be able to put a 1tb SSD into a lower end Air or Pro that Apple doesn't offer it on because I don't need the extra CPU or graphics of the higher end Macbook's. Beyond that are there any advantages to the Air over the Pro outside of the better portability of the Air? Thanks.