The trim levels go, near as I can tell
Tradesman
Express
Bighorn
Laramie
Sport
Longhorn
Limited
Some of the moves up the food chain are somewhat sideways, or you can option up a lower trim model to have the same stuff as the next higher package.But it's usually cheaper to just get the next higer trim level
I see you're from California, Not to sound like a fanboy, but check out Dennis Dillon,I'm only 35 miles away, but from what I've found they are the lowest priced, and worth the drive, even all the way from Cali.
Each time we have been in on the weekends there have been out of staters due in, From Cali,Montana,New Mexico,and I think Illinois.