If you're not a fan of 3D cartoons, I would say go with the following:
Flying Swords of Dragon Gate (I would say this is the "it" non-cartoon movie, but the movie itself...)
Final Destination 3D
Titanic and Captain America are also really good conversions, IMHO.
Tron: Legacy and Prometheus are good 3D movies, but the 3D is more subtle (which many here on this forum seem to like including me).
I can't really help with cartoons as I don't like them so much, but I did buy the Guardians of Ga'hoole and A Christmas Carol and the 3D in them is really, really good.
Video: Optoma HD3300, Panamorph UH480, Darbee Darblet, Samsung BD D6700 Blu Ray player, DIY Seymour Centerstage XD 138" Curved Screen
LCR - Tannoy DC12i, Sides - Tannoy IW63, Rears - Tannoy Saturn DC6ti Bookshelf, Ceilings - Tannoy CMS 603DC (TF), Tannoy CMS 601DC (TR), 3 Micro Marty/1 Full Marty DIY subs
Amplification: Emotiva XPA-3, Emotiva XPA-2, Outlaw Audio 7700, 2x Inuke 6000DSP
Receiver: Anthem MRX 720