I have a 2015 F250 PSD 4x4. Up front I'm running the Bilstein 5100 2" kit that includes springs and shocks. In the rear the truck has 5" readylift blocks and Fox 2.0 shocks. I run 295/70R18 (34.5") Michelin defender tires on stock rims. The ride is better and the extra height is nice, with surprisingly little change to fuel economy. That's probably due to the lighter tire choice.
Some things to note:
1. If you're boosting up the rear, make sure you use a pair of shocks meant to handle the additional height.
2. Tire choice will play a much larger role in performance and ride quality than the brand of leveling kit. Those Toyos you have your eye on weigh a whopping 75lb each. That's nearly 50% heavier than stock. What does that mean? Faster wear on your suspension/drive components, very poor fuel economy, sluggish acceleration, and a rough ride.
3. M/T tires may look badass, but that comes at the expense of nearly every other performance metric there is. Unless you use your truck off-road on a continual basis, consider going for a more reasonable A/T tire if that's practical for your needs. When I say off road, I don't mean gravel parking lots and dirt road driveways. I mean real off roading. You'd be surprised how well quality A/T or even A/S tires can perform on a 4x4 truck.
Have fun with your build. Make sure you put up pictures when it's done!
