The only lift I've had that I thought rode really good was Cognito and Fox shocks. You can get several performance levels for shocks with Cognito lifts. The most expensive Elkas or Fox shocks would have a lot of adjustability to disk in ride for your needs. That being said, it'll be +6k and then install.
These guys can answer your questions and tell you what works.
Find the best suspension upgrades with Cognito Motorsports! Lift and Leveling Kits that fit GMC, Chevy, Ford, Dodge, & Toyota trucks. | (925) 447-7800
norcaltruck.com
Might be better just to run a level kit and Bilstein 5100s on 35s. It would still look good and ride pretty well and cost very little.
I'm sure King lifts would be good too. I think s few guys did them on their 15000 ZR2s.