Stay here and make the most of bringing her here. If after a few years, when she has her citizenship, you both want to try living in Europe, that option should still be there, no? And there is still the rest of the US to consider, once you've maxed out the possibilities of your present position.

Then again, many parts of Europe are expensive, and you don't want to have kind of no future in your career. If you go as far as you can here, you will build up a high level of skill that might be transferable, but look into the job requirements there before going. A lot of trained people come here to Canada and are stunned to find out their qualifications need major upgrading, if that's even possible, to be relevant here. Instead of starting over in training, they start in a low level job. You can find out Euro immigrant stories for comparison.