If you plan to move in the next 6-12 months, you are probably better off moving now.
Now my problem is that I have to move to something, and not away from something. If the company and job aren't intriguing I have a tendency to perform not as good. And I still like my employer and manager, the latter more than the former. Plus, I need to be able to show something before switching jobs.
Something to think about on the next weeks and months, especially with a family and commitments. As I said, the market is good. I wouldn't have much trouble finding something if I really wanted to. On the other hand, having a stable income after a failed attempt on a start-up is quite nice, and I'm out of the probation period.