Hey guys, so, I was smoking a pork butt yesterday and pretty sure I've ruined the cheap green (the REALLY cheap smoker) and I'm shopping for a new smoker. I've pretty much made up my mind to go with a Weber Smoky Mountain. I'm trying to decide what size to get. Is the 22" really worth the extra $100 vs the 18"? I plan to do a fairly big Turkey for thanksgiving this year (15 ish pounds). Will the 18" accommodate a 15 lb turkey or should I go with the 22"?