That's a pretty decent spec as-is, especially if you can grab one for half the price. I wouldn't hesitate to do CAD/CAM on that machine. But, if you're looking for it to last you for about 3-4 years out, you'll definitely want to get something that either comes with 16GB of RAM or has an open slot to throw in another 8. On the graphics side, if you're running HSM, you'll want to get something with a pretty high spec. There's a lot of new cool stuff coming out in HSM in the next few years, and you'll want to be ready for it hardware-wise.
If you really want something top-tier and you have the budget for it, you may want to look into real mobile workstations such as those from the HP ZBook line. Here is one example, the
ZBook 15 G3.
To give you a frame of reference, we run Autodesk Inventor Professional 2016 and HSM Professional 2016 quite well on HP Z230 Small Form Factor workstations with Xeon E3-1241v3 processors, 16GB DDR3, Quadro K620 2GB cards, and 256GB Z-turbo drive PCIe SSDs. We run at 2560x1440, which about 77% more pixels than 1920x1080. There are a
few instances in which graphics could be just a bit better, but for most all of our purposes, these machines serve us quite well, without totally breaking the bank.
Now if you go 4K on your screen (which I'm not a fan of), that's a whole other story, and you'll want the absolute highest spec graphics card you can find.