I vote to make the jump. Look out 10 years, is there any reason to think JB will more likely be around than UAL, in any form? No.
It's a bit of a process, to go from hiring, to furlogh. Its like turning that aircraft carrier. I do agree, the economy can throw curve balls.
If needed you can always go to the Far East to put that Airbus experince to work, as a bonus, a wife is added. I think it could be a bonus.