Hmmm, first of all, the blue and yellow one is better than the black and yellow one... and I'd definitely keep the stripe on the neck.
Also, I'd try moving the confed logo on the wings a little further to the back, or perhaps enlarge it so that it reaches out further to the bottom as well. This would be really a subtle change, though, so it's not that big of a deal.
Perhaps a slight change to the hue/saturation of the main hull would make it look better as well? I don't know, the gray looks too "pure" for my taste. You could try changing it towards blue or maybe orange just a tiny bit... just another subtle change, maybe it's just me
Finally... I assume you plan on including warning signs, etc. next to the cockpit, engines, guns, and such, right? If you don't, well, then that's my only major suggestion... that mesh and it's textures are a great piece of work, man
--Eder