BBQ can be confusing, but it's actually pretty simple. If you already know the basics... buy whatever smoker you want, see if it works for you. If not, see if mods help. If not, buy a smoker you think makes up for what was lacking.
Lots of debates on the net... in the end, it's up to you. You'll find one purist saying never do this, never do that, so everyone follows him. Then you'll see a pitmaster doing exactly what the other guy said not to do, and he is cranking out the best ribs in (wherever).
All you have to do is cook, and you may even come up with your own method. No fear.