I would like to make a game that amalgamates Homeworld and Freespace with inspirations from the novel Ender's game. This is probably not a new idea, but I haven't seen anything that did anything like it. It would be team based and allows players to control units in an RTS (Homeworld) or first person fashion (Freespace)
I was doing some research on frameworks to help get me started, and my findings are summarized below. I believe one of the hardest parts is going to be UI, which Homeworld did a decent job at, but could be improved slightly.
OGRE: just covers graphics, with plugs for collision detection
Irrilicht: Covers graphics / collision with plugins for Sound. looks dated, though mainly because of aged art assets
Unity: While looks fairly complete, the Free version is feature robbed, and Feels more like a "for artists" tool. I would like to be figuring out programming problems, not where buttons are on menus.
Torque: From what I hear is abandoned.
Are there other obvious choices that I missed?