I've always liked the T-38 and the 2 DF versions (George Miller kits) I built flew very nice.

I modeled the same NASA T-38 aircraft both times, NASA 965. It was the only NASA T-38 I ever saw in blue/gray camo. When NASA received the airframe from the Air Force it had a fresh camo paint job on it so they left it on and painted their markings on it. Several years later they repainted it in their standard paint scheme. I modeled both versions. Pics of both models are in my gallery and my avatar.