My experience of the Chinese manufacturer Lenovo is terrible after-sales service. They have an online forum where punters put very oft-repeated problems, but Lenovo fails to reply to the posts or offer a solution. The Lenovos may look good... till they go wrong. Then you're on your own, as the online chat help is worse than useless. The woman who I consulted re. my insoluble power supply problems, so well known to Yoga2 owners, suggested they were due to "static". Most of her responses implied she was dealing with a host of callers and they made no sense. I would never buy Lenovo again.
December 2013 update. Here you will find the current best office/business notebooks for below 800 Euros (~$1064) reviewed by Notebookcheck in the last few months. Our list of top models is regularly updated, maintained and commented on and should assist in purchase decisions.