Pilots are Gypsies and until we get to FedEx or UPS we always need to be looking for our next gig. (Because while Joe Snuffy can conduct business over the phone and drive to his vacation he will always want his boxes to be delivered in 1-3 days).
Verticle career moves are ideal (more pay, better benefits and quality of life) but horizontal career moves aren't bad; especially if you haven't invested much in your current job. At the end of the day the only one who should care who you work for is you and your family.