It sounds like your mac was the exception, with the logic board problems. Furthermore, with something like AppleCare, if you had those problems during the course of the 3 years it covers, you’d be able to that repaired or replaced. As for issues with sharing files with PC users, you don’t specify which programs files you tried to share. Most any major program’s files are intercompatible – Office, Adobe, etc. If you were using iWork, for example, you could save those files as Office format to share with your associates. Regading TurboLister, have you looked for a comparable program for the Mac? And as regards your DVD burning problems, what was the issue? What kind of information were you trying to burn onto DVD? 4 years is the average lifespan for a lot of users, simply in the sense that they opt to get a newer machine at that point. I have a 5 year old PowerBook G4 that a family member still uses, and works just fine. I’ve seen people who still use their “Luxo” iMac, and someone who even still uses the Bondi Blue “original” iMac. If you think you’ll get a PC machine that’ll still run your programs in 4 years, all the best on that. Stability-wise, you can’t do much better. And, if you’ve been using Time Machine, when you start up your new Mac, you’ll be able to pull that machine image onto your new machine.