I vote for Lenovo. Horrible experience with my Thinkpad R400. Within 1 year,changed motherboard once (cannot turn on at all) and LCD twice (screen flickering, another time is whole screen white colour).

One cannot associate all Lenovo machines with IBM.
IBM only support Lenovo Thinkpad notebook. Ideapad series is supported by another party.

Lenovo's product quality cannot be compared to old IBM Thinkpad notebooks (old T40, T41, T42).