The range is fine. It's ~ 1-2X your annual income.
First, and foremost - your comment on the 401(k), not knowing the fees, is a red flag to me. The difference between low cost options (say sub .25%) and the high fees (over .75%) has a huge impact to your long term savings, and on the advice I'd give regarding maximizing the deposits.
At 26, you and your wife have about 20% of your income as savings. This is on the low side, in my opinion, but others suggest a year's salary by age 35 which implies you're not too far behind.
Given your income, you are most likely in the 25% federal bracket. I'd like you to research your 401(k) expenses, and if they are reasonable, maximise the deposit. If your wife has no 401(k) at work, she can deposit to an IRA, pre-tax.
It's wise to keep 6 months of expenses as liquid cash (or short term CDs) as an emergency fund in case of such things as a job layoff. They say to expect a month of job hunting for each $10K you make, so having even a year to find a new job isn't unheard of.
One thing to consider is to simply kill the mortgage. Before suggesting this, I'd ask what your risk tolerance is? If you took $100K and put it right into the S&P, would you worry every time you heard the market was down today? Or would you happily leave it there for the next 40 years? If you prefer safety, or at least less risk, paying off the mortgage will free up the monthly payment, and let you dollar cost average into the new investments over time. You'll have the experience of seeing your money grow and learn to withstand the volatility.
The car loan is a low rate, if you prefer to keep the mortgage for now, paying the car loan is still a guaranteed 3%, vs the near 0% the bank will give you.