Depends what you plan to do really and if you have other smokers available. I bought the Daniel Boone model a few weeks ago and I love it.
I have a big smoker for big cooks and mainly just wanted a nice grill that I could also smoke a butt or 2 or a few racks of ribs. If I didn't have my big smoker already I probably would have went with the Jim Bowie, although it still wouldn't have been big enough for some of the cooks I do. So far I've done pork chops, chicken wings, pork loins, butts, tri-tip, and burgers. All turned out great.
So my thoughts are how often will you be needing to cook more than what the Daniel Boone can handle? The Jim Bowie will use more pellets, so having to fire up a big grill to do a lot of small cooks will cost you more money in the long run.