Hi and welcome to the forum.

Even if the employer is taking care of your visas, you may want to keep an eye on what sort of visa they are working on. It isn't easy to get a working visa that allows the "trailing spouse" to work - and it can be hard to change from a non-working spouse visa to a working one if you're not careful. It can depend a bit on what sort of experience the employer has with bringing people over to the US.

The main thing to consider when it comes to taking a job in the US is the health insurance available through the employer. The US system is strictly private insurers (well, if you're under the age of 65) and the terms of the various plans varies considerably. If you think you might start a family while you're in the US, be sure to ask about the maternity coverage because this can get very expensive very quickly. (Watch the film "Sicko" if you have any doubts.)

You may want to also ask about either having a "house hunting trip" for you both prior to making the big move, to allow you to get your bearings and start to form some idea of where you'd like to live. And/or make sure that the employer will spring for a month or so of accommodation for you on arrival (usually in an apart-hotel or a suites place) to give you a chance to make your housing and other arrangements.

Sounds exciting. Keep us posted how the big decision is coming along.
Cheers,
Bev