In my experience, Lantern's advice is SPOT ON. Unless you have more specific questions, this to is my answer:
"My advice is this. Get the cooker that you keep thinking about. There is no real WRONG or bad choice unless you want a unit that can make Napoli pizzas in 90 seconds. But, the one you keep thinking about WILL keep nagging at you if you don't buy it first even if the other unit does a fine job."
When I was shopping for a top end pellet grill last year, one of the questions that I found myself wrestling with was this... Do I need my pellet grill to hit the screaming hot temps? If yes, that will whittle down your options. My pellet grill makes for an amazing grill, but it does not have the small blistering hot sear zone that the Memphis has... so, is that important to you?