A new system for CAD will be about $1,200 and up, which I doubt you or your paents want to spend. A new cheap laptop will be, well, crap, to put it simply, to run with CAD. You can also look at the newer W520 models or for an HP Z book. I like the Lenovo systems because they have some of the best build quality and case quality I have seen, in their top models which is the T and W models.