Jambo's are awesome, but who wants to remortgage their house to own one. 8-18 K for a pit.Nice and flashy, but I have beat a couple Jambos in my last comp cookin off my 60 deluxe and a WSM.
I would say that good Q is 50% cook, 30% cooker,10% quality meat and spices, and 10% luck and weather.
Langs are good units, I love mine, got lucky and found it used and in great shape. Are they the best in the world? doubtfull, but for the money, I think they are a good buy. Thay are tanks, and hold their resale value well. Thats why you don't see many of them for sale, and when they are, they usually don't last long.
No dissrespect to Jamie Geer, he has a great product, and a good market, but they are not practicle for most working folks.