airpolice,
You asked of the OP, "where is it that you are going, in order to be better off?"
It's the wrong question. The question you should ask is where are you going to avoid becoming worse off, to avoid a drop in the current standard of living of you and your family?
Where are you going to avoid paying more in taxes than you currently do, paying more for your mortgage, paying more for goods and services (ask B&Q, ASDA, John Lewis), paying more for your energy (green subsidies)? Where are you going for greater financial security?
Lastly, as TOFO has already said, where are you going so that your accent, and perhaps more importantly that of your children, doesn't become at the very least a social disadvantage, and potentially worse?