There have been a lot of great grill suggestions put forth here, so I would just say look at the following items when trying to decide what the best pellet BBQ is for you:
How long has the Mfg been in business ( I have seen some grills on the market for a few years then disappear. What good is a grill that will last a decade or more when you can no longer get parts for em. )
How easy is it to get pellets locally ( Shipping adds a lot to the final cost of your pellets. )
When you open the BBQ lid up, how much heat will you lose ( some brands are just designed better then others. )
Do not buy anything that has rubber pieces in the auger feed system.
Remember that a pellet BBQ is not the same as a gas or charcoal grill. You will not get those high high searing temps.
I have cooked
everything on my pellet grill in the last 16 years ( If you cook it in your oven, you can do it on your grill ) and the taste is unbelievable!
( Your gonna have to trust me on this one
)