Would you have just one aircraft in 1/700? I just finished my CAG for the Sydney, with 27 a/c. I found the biggest difficulty was getting the tiny models to be the same.
You can get a lot more detail with 1/350 or 1/400. trumpeter have some very cool kits in this scale, with decals more easily obtainable, clearglass parts and PE additions that are not bad. The details shown in the kit parts themselves are also pretty good as well.
I don't know if they will let you compete at that scale, but I would not object. I just thik you need to have more than one a/c at that scale.