This is a followup to this thread:
Thanks to everybody. I believe I have narrowed my decision.
- About refurbished well known brand: I rather invest in state of the art from a (relatively) unknown vendor.
- Laptop?: Not for me. Those devices are not designed to last of take much abuse. The constraints faced by laptop designers imply that many features are out.
I had no idea that the video card (GPU) was so critical... (Well, duh!). Since this PC is not for games, but professional work I selected a Quadro. However, I am worried that it is not made by Nvidia but by PNY.