It depends on the brand and who you ask I guess but also you can do some research and discover a lot by looking at what sells used and reconditioned and how old the places selling them will go back to and still offer them. If you ask the guys that repair and work on all manner of lap top computers and deal in factory refurbished ones they will almost invariably tell you that IBM is the best. This has been my experience also and I've owned a Toshiba, Compaq, Sony, and two IBMs so far. So far the IBM computers have outlived all the others combined.
I've had several guys tell me from places that sell and deal in reconditioned notebook computers such as USAnotebook.com that no other notebook lasts 12 years other than the IBM and its because IBM uses the top notch components unlike some other brands. So, if you want to find out what is the best in the way of note book computers ask the guys that sell them reconditioned which they have the least trouble with. They'll tell you IBM and if you ask them what they don't sell (well, actually you don't have to ask, just look at their web sites) you can see they don't offer Sony, and also you can immediately see by the operating systems offered that very few of the older brands, IE, Dell, Gateway, HP, or anything else are offered that don't use XP and yet they have IBMs for sale still using windows 98 SE in some cases. Although these are just now starting to fizzle out and 2000 are still being seen. It doesn't take a lot of thought to figure why you can still buy a used reconditioned IBM Thinkpad with Windows 2000 or XP home or pro. IMO
My wife bought a brand new $3200+ dollar Sony Vaio and it died completely in 14 months. Sony wanted over $800 to fix it and then offered a 30 day warranty. The IBM I'm typing on right now is a unit made in 03/ 2007 that I bought used with a six month warranty from usanotebook and for $200 and I've had it since mid 2008. Go figure.
STR