Looking nice. I feel the main upper section is lacking in detail though - its a bit unbalanced maybe, going by the number used on the entrance into the rock.
As for the model/texture dilemma - I think a model, either unskinned or skinned, belongs in models. Anything solely 2D - be it a texture, or a model skin that you didn't actually model (hard one to judge perhaps), or a piece of concept art, is probably best for the 2D art section. There are plenty other people who seem to face the same confusion though, its kinda mix and match ![]()