- Is my english that bad? ;-)
No, really not

- If you don't mind, I'd like to see some videos of your current game
Oh just wait, some eye-candy to add ^^
- Which tool should I should talking about performance?
- Which tool should I choose talking about support and future?
I'm a biased developer : Xith3D is what I use so it's what I would recommend you to choose.Currently and to be really honest Xith3D performance is the worst of Xith3D-Java3D-jME trio. BUT it's not because of bad design of whatever. There are some things being fixed and some others being implemented (like display lists or VBOs, for example). Talking about support, Java3D has Sun, and jME has another company behind it (Three Rings, is it right ?). Thus, I can guarantee you to have a working dev environment and workflow (integrating artists with flow) composed of the following tools : Blender-Cal3D-Eclipse-Linux-Xith3D-JOGL. They all works together perfectly and believe me, to get in your game what your artists designed is *NOT* easy, not at all. Fortunately the solution we've found is really convenient.