I spoke to Matt at Moe's about this very thing. He was very informative. I just ordered the Belltech 2/4 and the Hellwig rear sway bar. Matt said that setup would be fine for 99% of casual users.
Mine is a daily driver too plus I also tow with it. I ordered the Air Lift 1000 bags for the Durangos to help with the rear for towing purposes.
There seems to be some confusion I noticed while researching the forum. The bracket to drop the panhard bar is necessary to change the geometry of the suspension while the adjustable panhard bar is what centers the rear axle from side to side. It's my understanding that the bracket is more important than the adjustable panhard bar.
The upper and lower control arms is what centers the wheels from front to back within the wheel wells. I'll probably end up with the control arms and the adjustable panhard bar but they don't seem like a huge priority for a daily driver.
Also, I'm going to try running the stock shock for now. I've read of a lot of guys running the stock shock on the front anyway. Several others are running stock shocks all the way around.
This is a good explanation for the most part.
YES, the bracket is of the utmost importance when lowering the rear of our trucks to get the rear NEARLY centered side to side.
I say
nearly because if you look at the alignment specs that have been posted on the forums you will see that the Thrust angle is usually about .11* and not 0*. Granted that is within spec, the truck will appear to crab (track odd) from the rear. It's probably slight enough that most will not realize it. You can read more about thrust angle
HERE That's why I recommend the adjustable pan hard (track) bar.
As far as buying the upper and lower adjustable bars, pass on them unless you're going to autocross or something similar.
The Hellwig sway bar is another nice addition if your truck isn't equipped with a rear sway bar. If your truck has a rear sway bar then the Hellwig is another purchase that can wait.