Having owned, used, and supported Dells in the workplace and home, I can't in good conscience recommend them. Their pricing can be outstanding at times, but their service and support is abysmal.

If I wanted to get a new PC right now, I'd look to buying my own components and putting it together myself. It'll be cheaper and allow you to get the components you really want. It's not difficult to do. If you can build an ARF, you can build a computer.

The only brand-name desktops that I can feel confident in recommending are Apples, but nobody has written a modern RC sim for them.