I'm another OG Evo owner in the same boat. But, I currently have the Evo 3D which I can't stand (wonky digitizer) and a screen that go unresponsive constantly.
I am debating between the SG3, GNex and Evo LTE. I'm leaning towards the GNex mainly so I can upgrade Android easily. I loved the camera on the OG Evo, and the 3D isn't bad. Is the GNex camera as bad as people say? I'm not expecting DSLR quality pictures, but something I can use to show my kids activities to friends.