pb4uski
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
... Any other thoughts or suggestions? ...
Welcome Chris. You've made a great start by paying off all "bad" debt.
I don't see an emergency fund as hugely important if you both have stable jobs in desireable careers and good credit.... a few months of expenses in an online savings account is sufficient. To be honest, DW was a SAHM and we never bothered with an emergency fund but we did have taxable investments... we could have put any emergency on a credit card and then later redeemed some shares in the taxable fund if need be... luckily, we never needed to do that.
If I were you, my immediate priority would be to get rid of that pesky $87.35/month PMI and also 4.25% is a tad high these days... I just did some research for my DD on refinancing and in her area there was a credit union advertising 3.125% with 1 point for 30 year and 2.625% with 1 point for 15 year. Assuming your home is worth $170k then at 80% LTV your max mortgage would be $136k... so you would need to come to closing with ~$11k. YMMV, so consult with credit unions in your area.
You can raise that $11k by dialing your retirement contributions back temporarily to the minmum needed to maximize any match... then you can increase them later.
Beyond that I would not focus on mortgage reduction at all... just autopay the monthly payments and put any excess cash into retirement if you are in the 22% tax bracket or higher or in a taxable account if you are in the 12% tax bracket or lower. You may not know this but qualified dividends and long-term capital gains are tax-free/0% tax rate if you are in the 12% bracket or less and only 15% if you are in the 22% tax bracket or higher.