Well, to me, the Traeger/Rec Tek/GMG/Pellet Pro are pretty much the same machine. They look the same, sound the same, cook the same, they seem to only have some minor tweaks and controller differences between the lines. I would consider that your first tier and price range of options.
Then you get into MAK, Yoder, Fast Eddy's, maybe a few others. These seem to take it up a level but cost a bit more.
I started with a Traeger, it lasted a few weeks. Great smokes but I wanted more space, something bigger. I sold it and ordered a Yoder, I'm waiting for it to arrive still.
I'm biased to Yoder now because it's what I went with, so I think it's the best choice for the money. You will need to see what's best for you, here to answer any questions I can though.