Whether or not the Shivan hybrid idea works, I so think that the model itself could go over well as an upgraded Orion variant. Just slap standard Orion textures or perhaps some FS2 style ones, and you've got an upgraded Orion, with a higher top speed (thanks to the extra engine) and another fighterbay in the nose. Just needs FS2-ish turrets. Now, a while back, Raptor made a re-gunned orion model and he was considering replacing the mini-stub guns on the side with more dish-oriented ones, like the big ones on the Colossus. Dish guns would look good for this model, if its intended as an FS2-ish Orion upgrade.
Later!