We've been pondering this for about three years so if anyone can tell me what to do I'd be eternally grateful!
but in our case we really like the area we are in and don't want to move out, but can't buy the kind of house we want here (it doesn't exist). I want to stay because of the convenience of the local school, childcare, access to work and mostly because I already know people here. Just can't face the thought of being 'new kid on the block' when I barely have enough energy to keep my life on track as it is.
But if you like the new area better, and think you will be happy there, then I would probably move.