Black Friday is right around the corner but the deals have started early. Retailers have already begun offering killer discounts on everything from home-office PCs to decked-out gaming rigs and sleek all-in-ones.

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.