OP-
no one likes to talk like this, but since we're strangers on the internet, please let me advocate for a fairly even division between your wife's and your retirement savings, particularly if your two incomes are very different. I was an expert witness for many divorce cases in which the woman undervalued retirement savings (usually because she wanted the house instead), leaving her at an age with reduced earning power and reduced retirement savings.
Particularly if you're higher-earning, the reasonable thing to do is make sure your wife's 401(k) is beefed up. A judge will divide everything anyway, but it will change the starting point for negotiations. Which hopefully will never happen.