If you’ve been waiting for a new gaming PC, now is a great time to upgrade. Not only are PC hardware prices coming down, but Amazon’s October Prime Day sales have dropped them even further—and those discounts extend to prebuilt computers, too. One particularly great option right now is the Zotac Gaming MEK Hero G1, which is down to $1,105—a $595 discount off its usual $1,700 price. It combines the best features of both prebuilt and DIY PCs: You save time by letting someone else assemble the machine, but inside are off-the-shelf parts that can be easily upgraded or replaced down the road. The b…