When Fahrenheit Technologies, a wood pellet furnace company, introduced the Grilla Pellet Grill it was unlike anything else on the market. Efficient, easy to use, and with a very small footprint. The problem (if you want to call it that) was that it didn't have the cooking capacity that most people were looking for. To provide for that need, Grilla introduced the Silverbac Pellet Grill. This is a much more traditional pellet grill, but still efficient and easy to use. For the price (around $750) it is the best built pellet grill on the market and the one you should be looking at in this price range.
The Original Grilla Pellet Grill is the pellet grill to look for if you don't need the capacity and want a very small footprint.
Rec Tec Stampede RT-590
When the Rec Tec Pellet Grill hit the market a few years back it was an instant hit, largely due to the amazing marketing job done by its inventors. Their pellet grills appeared everywhere and had a massive online presence in a very short time. They have moved on from their original Pellet Grill to a whole line. The Stampede represents their fullsized, low priced new pellet grill. Perpetually on sale for about $800USD, this is a serious competitior in the lower end of the market space and promises to be a popular pellet grill.
Camp Chef Woodwind with Sear Station
The biggest limitation of pellet grills, particularly in the lower price range is that they simply can't get hot enough to do serious grilling. The people at Camp Chef have chosen to throw out all ideas of trying to make the grill hotter and have fitted this unit with a gas powered sear burner on the side. Basically, this is a full sized pellet grill with a small gas grill mounted on the side. Generally, I don't like these types of configurations, but if you are serious about barbecue and grilling you are already thinking reverse sear, which is really what this grill is designed for. You can slow smoke foods on the pellet side and then finish them, hot and fast over the sear burner. There is no need to wait for the pellet cooker to reach a higher temperature (which it probably can't). As a compromise to an age-old problem, this is a clever solution.
Smoke Daddy Pellet Pro 680
The Pellet Pro grill comes from Smoke Daddy, a real garage started company that began list making aftermarket accessories and smoke generators. Their background is in wood pellets, so it was only a matter of time before they began producing pellet grills. Their proprietary controller is excellent and while a classic pellet grill design, this unit contains very good technology. I certainly recommend taking a look at this unit in the lower end price range. At around $700, it is one of the least expensive pellet grills worth buying.
Green Mountain Grills Jim Bowie
Large and well construction this pellet grill from Green Mountain Grills is a workhorse. While not very innovative (there is a wi-fi enabled version for about $170 more) it is a very good pellet grill. Temperature control can be a little weak with this unit, but in the price range it is comparable. I definitely recommend taking a look at this model before making a purchasing decision in this price range.
Traeger Lil Tex Elite 22
This is the world's best selling pellet grill. At around $700 it is also one of the least expensive pellet grills. The problem with it (which doesn't really detract from its abilities) is that it weighs less than 100 pounds, making it also, the lightest full-size pellet grill. From the company that evolved out of the inventor of the pellet grill (Traeger has passed through a few hands over the years), this is a classic unit. The controller is limited, but capable. The body is thin and doesn't hold heat, which is why it doesn't appear higher on this list.
Pit Boss 700SC
The Pit Boss pellet grills come from Danson, the second largest maker of pellet grills. This model is another of the classic, inexpensive pellet grills. It is hard to say that it is impressive, but it costs the same as the ever popular Traeger Lil Tex (around $700USD) and does everything that grill can do. The biggest difference between the two is that you can buy the Traeger almost everywhere these days.