The ThinkPad (Used to be called the StinkPad if I recall correctly).
In the world of Windows there are few doors, the ThinkPad is one of them. Okay I have been swayed by my MBP and now understand that I can have form and function, but in the dark days, I needed something that could handle the corporate build, the 157 default applications (I think I used 8) and the rigors of the job.
The ThinkPad was it. I don't have time for most of IBM's other offerings, server, desktop, software, but the ThinkPad was and still is my 1st choice when it comes to a world of Windows but no doors.
....Plus they bounce really well, I am talking from the top of a 47U cabinet.