I was in the same situation a little bit ago, unfortunately my wife blew $10k of it into the mortgage before I realized (lol). I would have preferred to invest the $10k but oh well. Thankfully the bonus was big enough to have a balance left over to invest after that mishap. What I did with the rest of it was backdoor some Roth IRAs (i.e. open a tIRA and click "convert to Roth") for 2015 and 2016. You can actually still contribute to and roll over a 2015 Roth IRA until the tax filing deadline. Just keep in mind that if you go the Roth route, the entire process will take you about 2 weeks to complete unless you already have money sitting in your settlement fund to pull from. 2-3 days to pull money from bank, 2-3 days to open & invest in the tIRA, 2-3 days to convert, etc. So if you wanted to truly maximize these vehicles, you'd max out your 2015 IRAs instead of opening 2016 because you have all year (and part of next) to do those.
However, since you are averaging $175k/year I would make sure you're already maxing your husbands 401k, 529s, and HSA if available, then Roth, and then taxable accounts.