I am running a 6 year old Toshiba that will do everything you are after, except possibly the very high resolution possibly required for your cad package. I have both 2D and 3D cad packages that work fine. this is an 8 core Intel i7 with 8 gig of memory and 500 meg drive. IMHO, you probably want to pay attention to the graphics capability and the possibility of running a second 4k (HDMI) monitor for your cad work. A gaming computer might be over kill, but maybe necessary for the graphics capability.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV.
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