Well the good news is you have a lot of options. But I will just toss my thoughts out:
1) Thuren springs and call it a day. Rear is optional. (they have 6.4 springs now)
2) BDS 4 link kit (I wouldn't get the basic kit, see below)
3) Zone basic kit (might as well save money vs BDS if you aren't getting the 4 link kit)
4) I haven't seen any reviews, but superlift 4" with Bilsteins could be good? Might only be cummins though, not sure on this one.
5) I wouldn't do rough country or fabtech on this application, theres just better options for the same money.
Thuren would arguably ride the best, but its only going to give you a 2.5-3" lift. The majority of ride depends on the tire, but if you get their shocks it will handle the bumps and potholes smoother than any off the shelf shock. BDS 4 link with fox shocks is the best bang for buck IMO, but as I stated if you aren't going to the 4 link kit, I would just save money with the zone lift. You would probably want to upgrade shocks on the zone kit though while I'm thinking about it, so maybe buying the BDS drop kit with fox isn't so bad.
3-4" looks the best with 35s IMO, I wouldn't go much higher especially if you run a normal offset wheel.
You might enjoy:
http://www.ramforum.com/f158/lifting_my_2016_ram_3500_a-72413/
http://www.ramforum.com/f40/2016_ram_2500_megacab-85325/
They are bigger than you want, but....