Well I'm in the same debate as you but what I'm thinking is take which ever colour is in stock and if you don't like it down the road you can always get it wrapped and with the wrap you can go nuts if you want and get neon matte orange if you want and the joy is its all removable
But if I had to choose from all the pics I have seen I'd say ultramarine because it seems to be less common and if you get some black rims on it or the trd xb2 19's I think it would look great if they are the right bolt pattern I have not seen any on have them on an frs or brz
