You have a telephone call at the front desk

OK. It’s time for a question completely unrelated to cars, boats, trains, or planes.

A while back I remember you (Nibby, Eggplant Wizard PhD) buying an HP Z620 or some such workstation. Is that the right model? Anyway, I’m looking in to buying something similar and want to know how it’s working for you? I’m not into gaming, I just want something quiet and powerful, enough horsepower for 3+ screens, and room for several hard drives. I’m looking to spend around $600. What’s your advice?