This guy is a big fan of Samsung, despite the case cracking on his? Sounds like a range of laptops to avoid.

I have a Thinkpad T410, it has been very solid, I don't think there is one item that will physically wear out anytime soon, except for the power plug, which is larger than most brands, but has started to become loose. Oh for a magsafe power plug! Actually the little bumps on the trackpad are starting to wear off in the middle, but this doesn't seem to affect it's function.