I have the Wheelers 5-pack (1.5" lift over stock) and they perform very nicely. I've put about 15-20k miles on my set in about a year and they do great for what I use them for. I have a 3600lb Mastercraft speedboat that I drag around, along with endless work loads of mulch, firewood, camping/offroad trips, etc. Very big improvement in ride, towing/hauling and just day to day errands. Though, unloaded, they do ride rougher than stock but you'll get that with any aftermarket pack you get unless you consistently haul weight. After a years time, and all this, they have maintained their ride height and functionality. Even loaded down with a yard of mulch, the springs only sunk about an inch or two, basically leveling out the truck front/rear. These leafs are made by Alcan Spring Company.
I live in Indiana and truck is in pretty good shape (undercarriage wise). Though, when I completed my install, I replaced: U-bolts, front main eye bolts (I had to cut off the old ones, went with new greasable), new shackles and poly bushings. As I said, my truck wasn't bad but it was worth the $$ to have all new hardware. I recommend it, especially for the DIYer. I would also recommend getting the parts from Wheelers or the dealer you buy the springs from, most shops will likely have to go to the dealer for parts as they are likely too specialized for Napa or others. Not to mention, the parts will be beefier and made to handle the springs/lift. All in all from Wheelers, I paid about $1200 shipped for a complete suspension upgrade front and rear with hardware and assembly on the front struts. Took me about 5 hours to complete the work myself with a buddy. Not for a novice but if you have the right work area, tools, and understanding of how to turn a wrench, you could figure it out. You'll likely have to cut off some bolts so have a good cut-off wheel or sawzall handy.
No matter what you do, you'll see ride improvement over the factory or TRD packs. They really are junk. If you are looking for stock ride height or close to it, you can't really go wrong with the Wheelers. The OME springs were my second choice since they were cheaper but I didn't want a huge lift since gas mileage is a factor. Without first hand experience with the OME, its hard to say how they compare but in my experience, you get what you pay for.