If you want aviation stuff, California probably has the most. Plus the weather is usually pretty good if you want to do some flying.
If you wind up in the near Washington DC make sure you go to the Air and Space museum. go to the Udvar Hazy facility out at Dulles Airport.
If you want to find out about jobs etc Air inc
http://www.jet-jobs.com/
runs job fairs and has other info that will help you find out about the jobs situation, pay etc in the USA.
Best thing you could do is come at the end of July and go to the EAA flyin at Oshkosh, Wisconsin. The ultimate aviation experience.