I am considering purchasing a new Dell XPS I7 skylake quad core desktop vs. a used Lenovo S30 workstation with Xeon E5-2670 8 core/ Nvdia GeForce GTX 660 graphics- both about the same price. The Xeon supports much more ram (maxes at about 250 gb- I was going to get 64 gb) and has a 512 SSD, but...