Go for it Chock. After surviving the CAA system, the FAA will be a breath of fresh air to you. And if you have the right to live and work there, I wouldn't come back to Europe if I were you.
I recently spent 2 years in the US as CFI and air taxi driver. Just finished converting to CAA ATPL.
You will find the writtens a piece of p*ss. Don't worry about nav or tech, not even an issue over there.
Prepare yourself for a far more practical system, ie. not much emphasis on the theory, but the prac is very demanding and an excellent learning experience.
Good luck.
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It's all fun and games 'til someone gets poked in the eye.