We call the Lenovo W541 and W550s ThinkPads running Linux the "Raptor".
They are powerful desktop replacements, with quad-core processing, 2880x1620 "3K" displays,
fast NVidia graphics, substantial hard drive space, and up to 32GB RAM.
The W550s is a slim Ultrabook design, with no optical drive and dual-core CPU.
For the smaller 14" T450s, please see the Toucan T450s.