Budget-wise, if I had to choose between those two, I would go with the Pit Boss over the Camp Chef. I have seen both and the Camp Chef, IMHO, just feels way too flimsy for my taste.
Down the road, after you get into the pellet smoker scene and like it, then you may want to upgrade. At that point you should take a serious look at the MAK Grills. They look pricey, but the difference in both quality and versatility is nothing short of amazing.