Obviously I am late to the party as you have already made the plunge, but I love my Traeger, in the summer it is pretty much the only thing I use to cook. I have the regular Texas and am very happy I have the bigger one. I am also a hunter, so I make homemade pepperoni and smoke/cook lots of meat on it at once, so having a bigger grill comes in handy. I will also do entire meals on it, meat, veggies, potatoes, etc all on at the same time. I can fill the grill up with pretty much everything I am cooking, so even when I am just cooking for me I get my use out of it.
As far as good place to get pellets, Costco has the best price, but they also only have Hickory unless a dealer is in there. Freddies usually has a good deal on BBQ stuff, pellets count as an "accessory", so take advantage of those sales.
Accessory wise I have the rib rack, I can get 8 rack of ribs on one half of my grill (could fit 16 racks of ribs if I had to racks). Comes in handy if you are hosting and doing a bunch of ribs, as they take up grill real estate quickly. And I just got the smoking rack for Christmas. My buddy has one, here is a pic of all the pepperoni we were able to get on the grill with it.
