Lenovo ThinkCentre M79 10CN0002US Desktop
What really sets this pick apart from other great budget desktop computers is this one is available for about half the price of something like the Dell XPS 8900 or HP ENVY 750-110. With that in mind, you still get some solid performance thanks to an AMD dual-core APU in this system which you can upgrade to a better chip if you want to spend a bit more. You get 4GB of DDR3 memory in this system with options to upgrade to 8GB or more up to 32GB, but doing so can more than double the price of this computer.
You get integrated video with decent performance thanks to the APU and while you can add 1GB of dedicated graphics memory, this isn't a great choice for PC gaming or streaming HD media. The 500GB hard drive in this model is a bit small but should work well for many setups, and you can upgrade to 1TB or more storage for just a little more money. This pick comes with a DVD burner and offers two USB 3.0 ports, four USB 2.0 ports, and an Ethernet port. While it doesn't come with any wireless connectivity, you can add Wireless-N support and Bluetooth 4.0 for a minimal additional cost.