These conversations are always tough, because once a guy lays out $3K, he' gets pretty attached to his cooker, while the guy cooking good Q on his $179 cooker thinks he's outsmarted everyone.
They're al good. There is just something that triggers each of us to have a preference.
There are trailer cookers that run a long cycle just like a WSM. Try a Jedmaster or a JOS. You can also mount a Backwoods, an FEC100, a few Big Green Eggs, or a combination of things on a small trailer, or inside an enclosed trailer.
When you start looking at Klose these other options become affordable. Don't get me wrong, Klose builds beautiful pits, and some guys can't imagine having anything else, but it's not my preference.
My beef with the WSMs is that you have to deal with the messy water pan, and you have to dig the food out of the bottom shelf. I know this doesn't seem like a hassle to many, but if you spend any time cooking on a bigger more convenient cooker, you'll understand.