Summary: I purchased a Dell workstation with a K5000 in it. That's the newer Kepler version, with built-in H264 processing and a bunch more cores. Trouble was, the K5000 isn't officially supported by Adobe Premiere. So, I picked up this 5000, which Adobe supports.
Summary: I ordered this nVidia Quadro 5000 because it was priced some $85 below the Amazon retail boxed version. I know HP is an nVidia Quadro partner and uses these cards in their high end workstations, so I had no qualms about buying it.