Antonio-
Health insurance is a major problem here. Not only is it expensive, but many companies do not provide comprehensive coverage for their employees. Health care in the US is really in a state of crisis. Although it may be difficult, I say you give the US a try, if only for the experience! You already know what it's like in the UK. If it doesn't work out for you in the US, you can always give it a try in the UK. Good luck to you.