Pelletheads.com is a great place to get info. In all of our research, Rec Tec and Green Mountain Grills seemed to be at the top of the pack in their price range. It was a tough decision but we opted for the Rec Tec Mini over the Green Mountain Davy Crockett because it was a little bigger and the grates were heavier. We can get our Rec Tec up to 500 and cook steaks on it regularly. They may not have grill marks like you can get on a propane but they are definitely tastier.
After reading reviews about the small Traeger, we stayed away from it. Lots of complaints about it not holding temp. I didn't read as many negative reviews about the bigger Traegers so they must hold heat better. My BIL has one and loves it (and the food off it is delish).
If/When we are ready to get a larger pellet grill, we will get a Rec Tec or Green Mountain.