What ever happened to company loyalty, right?
It's interesting to note that while companies would like their employees to stay loyal to them, most will have no qualms to remove them once they've outstayed their usefulness. Call it what you want, VSS, restructuring, transfer, etc... just the same la!
So I say, do what you need to do. Don't let anyone shortchange you. If you need to go, just go. Company loyalty is dead. PERIOD.