Cyber Monday is here and the deals are well underway. Retailers are offering killer discounts on everything from home-office PCs to decked-out gaming rigs and sleek all-in-ones. Still, not all computer deals are built the same.

For more than a decade, I've tested PCs and edited hundreds of reviews, so I know what's a good deal and what you should skip. These big deals from Acemagic, Acer, Apple, and Dell are worth a look.