Great discussion. I picked the 3500 after having dealt with the 2500 suspenson woes in my 6.4 Hemi, and TPMS nannies. I needed slightly more payload for all our gear, and I HATED the TPMS system. Keeping the rear tires inflated to 80psi needlessly while unloaded is asinine. I also spoke to Don Thuren about his leaf system back in January when he was designing it. We exchanged a few emails, and I will be adding them at some point. They offer 12-14" of travel, which is plenty, and the ride should be similar to my 2500. Honestly with the 37's and the AEV Bilsteins, it is better than the 2500 stock. Especially when the 3500 suspension is loaded.