If you're willing to spend $800, why not build your own? A lot of people on here would be willing to link you to cheap parts, and you can put it all together when you get the parts. This could end up being way cheaper than buying a pre-built one from a manufacturer.
The deal is already over for the computer I put together, it was a barebones kits with some low end hardware, but I haven't had problems with it yet, except the initial setup (it was my first time putting a desktop together, and I had a couple problems that I soon solved thanks to the TGC community).
My name is Brian.