Hello Kevin and welcome to the forum!
Honestly having to move the 4T into place every time you want to watch a movie sounds like a nightmare to me, but maybe I'm just lazy!
But really I don't think you necessarily need a tower in a small space like that for mostly movies/games since the center channel will be doing the heavy lifting.
However, if you think the 4Bs will be a little too small you could always go with the 5Bs, which I think may be just right for your fronts in your set up. As long as you can give the 5Bs a 4-6 inches to the rear so the port isn't right up against the back wall.
I'm thinking something along of the lines of the 5B Fusion SD would be your "goldilocks" system, not too big and not too small.
Along with the 5Bs you'll get the larger 5C for your center, which is fully wall mountable, the 4Bs for your surrounds and then the Bravus 8D for your sub. For your usage and size room I think it would be a great fit.
I hope that helps, but please let me know if you have other questions, thanks!
Jason Hicks
Aperion Audio Guru