Big E vs Nimitz

Better is subjective. Fit seems about the same, both require re-work if you aim for accuracy, Trumpeter's Nimitz at least provides a hangar DECK (no bulkheads) if you want a little bit of a start on detailing.

Tracy is correct. I have both kits and they can both be improved significantly by available aftermarket photoetch. Nimitz comes with the beautiful Trumpeter aircraft while Enterprise is a bit dated.  There is a current thread running by A. M. Jorge who is doing a beautiful job on his Tamiya Enterprise, but he is doing an exceptional job with the GMM PE set.

One advantage of the Nimitz kit coupled with the GMM set is that you can build most of the ships in the class.

Thanks for the help. I've decided to go with the Nimitz kit.

I hope you end up posting your build Tates, I haven't seen the Trumpeter Nimitz yet, Warshipguy is so right about the aircraft, Trumpeters aircraft kits are excellent, also I picked up a set of Gallery Models Marine aircraft which are also excellent!