If you were single, I say go for it. But you have a wife and kid and thus, it makes the decision much much harder. My wife and I talk all the time of possible job changing, but several factor come into play.
1. expendable income. how much is it a month? can we sacrifice that?
2. family - I am no longer alone in this. I have a family (even if it just two of us) we have to look into the future. We may not like the job, but it DOES may the mortgage, bills, and we live comfortably.
Consider what you have told us that your wife is NOT working at this time and no ETA on when she might work, taking a 6-10k hit is a BIG hit with a family. Especially with kids. (don't raz on me Chaz) Your income is currently support 3 people. That is a lot of mouth to feed, clothes, house, and transportation
Kids grow and constantly need new things (varies) so... 6-10k cut would REALLY put the hurt on that.
I have to agree with Dave that you might just have to stay with this current job for now and maybe hope for something comparable in the future. When your wife start working, then you have to rebudget for daycare (my sister is paying around 1000$ a month in Portland and they are REALLY good with my nephew) and other expenses that comes along. Then you may switch to a new job (hopefully as stable)
Yea, when you have a family all decision is no longer one person to make, it is a team effort now and sometimes you just have to do what is best for the team and not just you.