Hi guys, I am an engineering student doing Mechanical Engineering with Aeronautics. I often use solidworks and in later years will upgrade to 3d cad etc. I wish to buy a mobile workstation which must not only be powerful but also as much portable as possible. I almost decided to buy a dell precision 5520 considering its good performance and good loks and portability as well. But today i got to see hp zbook x2 detachable workstation with almost same features with some different specs like hp has dualcore processor and dell has quadcore etc. I am confused at the moment. I can sacrifice on portability but I cant sacrifice on the performance, hence I need a workstation which would last for years without making me invest anymore money. Your suggestions and help is appreciated. Many thanks.