Desktop PCs have become less popular in recent years, but don't let that discourage you from taking advantage of some major horsepower at a surprisingly affordable price. For example, this ENVY 700xt desktop from HP has a powerful quad-core processor and plenty of storage. So it could easily serve as a media streamer, an office workhorse, or even a gaming PC if you're willing to invest in some upgrades later on. Best of all? We found a coupon for this desktop that will save you some serious cash.