This working in the states thing is really a load of old tosh, unless you want a nice hol, bit of fun, probably single, want work in that arena of operations and have a chance of getting the appropriate visa.
Factor in accomodation and get yourself properly set up in the UK for vat and income tax and there is very little difference.
For info I passed my FI rating early Dec and started work 2 weeks later with and excellent employer, FI rating is a pretty good route at the moment if you can get yourself there.
Do get out there and talk to lots of people in the UK if thats where you want to work....and there are always deals to be done.