Sadly, Lenovo cannot be relied on as they once were (even for the first few years post-IBM). My W520 has been to warranty depot three times - still not fixed - for this problem that has been known for 1.5 years:
Just as it has always been, the T series will be the best built laptops. You were free to purchase a T530 with any of the i5 or i7 CPUs and 1920 x 1080 screen. The only downside to them is the lack of higher end GPUs. They are just about as solidly built as the older T series.
I bought it specifically for the quadro 2000, for volume-rendering and cuda. Thanks for the heads-up, I didn't realize the W series was created post-IBM.
http://forums.lenovo.com/t5/W-Series-ThinkPad-Laptops/W520-s...
I'm still using, and loving, my T61P. If only there was a way to get an i5 or i7 in that lovely reliable chassis :(