I have a 2011 Ram 2500 CTD, crew cab, 4x4, with an auto. I love it. Very refined, smooth, and quiet for a diesel 3/4 ton. Go check out
www.cumminsforum.com - the best online forum for all the CTD's. Of course, you'll see guys there mentioning problems as well as praises.
I did a lot of research and wound up with the Ram due to these reasons (just to name a few):
1) To get an equivalently equipped truck in a GM or Ford I would of had to sped $5K or more.
2) I don't have to use urea
3) Of course the legendary Cummins motor that has been proven in its current configuration for years now
4) The new Ford motor and serviceability thereof scared me. (It takes exactly 3 minutes to change the fuel filter on the new Cummins. Less for the air filter).
5) Personally, I think the new Ram exterior and interior are the best looking right now.
I suppose it depends on how new you're wanting to buy ($$$), how long you plan to have the truck (past warranty?), and if you plan on doing any of the work yourself.
On the 2010+ models there have been a few tie rod recall issues and an HVAC flapper door issue, but other than that, they're solid. (And mine didn't need either issue addressed.)