Gotta say one more thing - I was wrong about Keysight's Customer Service. Though I do my best to be calm and respectful, the original issue may have been my fault.
After I replaced the defective display (?$101 USD), they didn't have any problem selling me a one-year Service Agreement. They state specifically that it isn't a warranty so I'm not sure what I got, but I'm happy to have something to fall back on if the new display fails, I hope... I've talked with several people from there now, and I appreciate their effort in working to help.