Rev A 17, bought since it came out. Longest a computer ever lasted me. When I used to build PCs I used to upgrade them every month to the latest and greatest technology. I was younger and a bit into lazing around so I needed a hobby. When I got into Macs I chewed my way through a Lombard, Dual 450, a Dual 1Ghz and 3 Tis in two years. So this is the longest I've owned a Mac, but then I haven't needed much power of late. I did buy a Rev A 12 but sold it after 3 months because I hated the heat.