I have Dells and Sonys around the house. Sony's tech support isn't non-existent. You just have to know where to find it.

Truly. I have found frequent updates for software and drivers on their support site, and their phone support has, in my experience, been better than Dell's. Dell phone line tech support used to be awesomely good. Now it seems to be awesome in a different way.
The two Sony video editing systems have been terrific in their limited roles. I did experience early failure of a Western Digital drive on one of them. (Actually, it wasn't a frank failure. It just started making a high-pitched buzz that I told Sony support was annoying me.) I was kind of annoyed that the only way I could get the drive replaced was to ship the system all the way across the country (at Sony's expense) to let them replace it themselves. On the other hand, the time from first phone call to having my system back in operation was four days. And I got a faster, quieter hard drive in the process. System function on these machines is flawless. They run like freight trains (quiet ones) constantly with no errors of any kind ever cropping up. And they get used very heavily.
On the other hand, I've never had any failures of hardware on my Dell workstations, though two of them use the same WD drive model that failed in the Sony. The OEM images, which I blew away with retail OS installations, are not nearly as well-integrated and functional as those on the Sonys. Dell just seems to dump stuff on their drives to create the image instead of designing components to work really smoothly together.
Slightly OT: But my Dell notebook has failed repeatedly over three years. Most, if not all, of those failures were due to the incredibly lousy build quality -- flimsy plastics and flexible chassis. Despite my three year on-site-next-business-day warranty (which costs extra, of course) Dell has not managed to get that machine up and running in less than a week's time, minimum. One repair took three weeks! How many repairs? Ten. Yes, ten.
- prosaic