The holiday shopping season is just around the corner, and if you can't wait until Black Friday to upgrade your gaming desktop, you can save big now on brands like Alienware, HP Omen, and Lenovo.

Best Buy has its own set of early Black Friday deals going on right now. This sale will be updated with a fresh batch of deals every Friday leading up to Black Friday (November 15 and November 22). It also means that some of the previous deals will also expire.

For prebuilt gaming desktops, a few companies are reliable and widely available. Dell's Alienware division produces solid if sometimes pricey PCs that have a fan following. Asus's Republic of Gamers line hits the midrange and high-end markets with good machines. Acer's Predator line is also good, and HP's Omen models have their adherents.