Guys with the added weight of the RH front bumper I just installed I think new coils and good shocks are a must.
Rye who sells Lorenz kits?

Here is the bumper I just installed this morning
BEFORE

DURING

AFTER

 

The bumper looks good.

The basic $565 Lorenz kit doesn't appear to be progressive coils unless you spend $200 more for the plush coils. That makes their kit $765, the Kore kit is $475 and looks to include progressive coils. Personally I would go with the Carli kit for $825, I like their sway bar solution better than drop blocks. I would also budget for an adjustable track bar to recenter the axle.

 

Lorenz Industries. Maybe things have changed my kits from 07 so I'm not up to speed.
Any of the three, you can't go wrong.

 

I can't believe the Kore kit is $475, can't be with everything?? That's a sweet deal.

 

Just to add my $.02...

I too just added an aftermarket front bumper replacement while running a 2" spacer...needless to say, it only took about a week to realize that it was time for a front end upgrade to support the additional weight and the ride was awful!
Point is, I ordered the upgraded coils and Bilstein 5100s from Lorenz and the truck rides "almost" as good as the wife's Enclave (rides a TON better than it ever did before...)
This is the kit I ordered:http://lorenzindustries.com/kits_bilstein_leveling.html

Again, besides just having pulled the trigger on my trans upgrade (Garmons)...this Lorenz upgrade is the best money I have spent to date in an effort to make a significant improvement to the truck.

 

www.thurenfabrication.com. Don offers an inexpensive quality 2" coil and can supply some white bodied longer shocks for you for a superb ride.

 

You can truly transform the way your truck rides and performs, but like anything else you get what you pay for. So you basically need to figure out your budget - that's going to dictate what direction you go.

 

I have decided not to even add a leveling kit. I just added a set of black 22.5" Alcoa wheels and I absolutely love the look of the truck this way. A nice ride height and the tires/wheels really feel out the wheel wells nicely.