Maingear has been a big name in custom PCs for over 20 years and has earned a sterling reputation for its high-end PCs, especially for gaming, and strong customer support. While its flagship MG-1 line, ranging from just over $1,100 to the $4,000 machine I tested, has plenty of features for hardcore gamers to drool over, the MG-1 can also be an outstanding option for creatives.