Southern Pride - Is expensive, but you are paying for quality and ease of convience (sic). They are reliable, easy to use, built to last, and produce fantastic product.
Cooh Shack - Again easy to use, not as well built as SP, but will last a long while, produce great product.
If the choice is between those two, it comes down to this....
They are both "pick up trucks" one is a dodge the other a chevy, do you prefer dodge or chevy?
The SPs use fire place size logs and gas to achieve their smoke and heat
Cookshacks use Food grade pellets for both smoke and heating
The SPs you can use as a gas oven without the wood for baking and such so you have a multi purpose piece of equipment, but if you do use them as a gas oven they will still impart a smoiness to your finihsed product (a trade off)
What are you planning to do with this smoker? permanent or mobile?
just bbq or oven also? large volume or smaller amounts?