Best rear lift for 2008 tundra?

Just curious in what you guys think are the best way to go for a rear lift on these trucks. My truck is currently lifted 3 inches in the front and 1 inch in the rear with spacers to clear 34" tires. It rides like crap and after a while with this setup, I will be swapping this over to Bilstein 6112s up front with JBA upper control arms, and Bilstein 5160s in the rear. Should I leave the block in the rear to keep the truck level, or should I go with a shackle lift? Or would it be better to just do new leaf springs entirely, with new bushings in the rear? My truck is also 2wd for reference, and I want this suspension setup to feel like a new truck. Thanks in advance, and let me know if you guys have any other recommendations on suspension setups for the truck.

 

New Dobison's leaf packs, and some extended bump stops, maybe Timbren. Ironman 4x4 greasable shackles and bushings. A brake line relocate kit and a driveshaft drop spacer kit if not already installed.