In my experience, Dells Latitude series is working well, and the support really works, but you'll pay for it. While their cheapo models sucks Elephant balls, and their support is on that level too. On the other hand, my limited experience of HP is similar. It's the support level that makes the difference. Also, always check the "keep the harddrive" option. Otherwise, if the harddrive crashes, they will keep it and replace it with a clean drive. And one thing I've learnt is that even people that claim that they take backups, don't.
Light moves faster than sound. That is why some people appear bright, until you hear them speak. List of common misconceptions