Everything looks cool, though the buildings need to be touched up a bit (though I'm sure you know that)
I 'might' be able to help, since I do modeling of my own on my own freetime, but texturing is not something I'm very good at (plus, I have no idea what mesh type the buildings and vehicles use, so it's hard to touch them up without knowing whether or not Blender 3D *The program I use* will be able to open them)