You might want to do some self examination first. How do you plan to use the smoker. How many people do you plan on cooking for? Is cost of fuel an issue? How much work do you want to invest in tending your smokes? What kinds of things do you want to smoke? Shorter smokes or all nighters? How much time are you willing to invest in learning the ins and outs of your particular unit. How many modifications are you interested in making to your smoker?
An old friend once advised me to never buy a new camp trailer the first time out. He advised a few years of experience with different used units to learn what I really wanted and needed from the trailer. Then spend the money on my new dream trailer. You may want to start with a cheaper unit. Your first unit will probably not be the unit you want two years later.
I warn you that membership in this forum can be dangerous to your wallet! You may end up collecting or even building smokers. Not to mention all the other evil things our members can lead you into.
Good luck and good smoking.