My current work computer is a Lenovo ideapad. It is ok. I have had no issues with it so far. Doesn't feel particularly flimsy, so that is good...
If you can get the thinkpad series, those are rock solid. I have had some experience with them: They are not sexy, but they are just so durable...
dextermat is right, though: Get an ASUS. They have the best warranty and some great computers...