I should have made it clear that the DH take home number is NOT including the bonus money. Also, we work for an investment firm and can not buy stocks, so that is not an option. We donate about $4000 annually - both in cash and goods (adopt and family, buying turkeys, etc).
Can you invest in an ETF? If so, that would be my suggestion. But really, you're at the level where your accountant and broker should be working together and telling you want to do.
ETA: I also like the rental property idea, but I've found that having a rental property that you use yourself can cause problems and unnecessary headaches (tax and otherwise). Still, it's not a bad idea, you just have to be willing to do the extra legwork and pay for the extra tax guidance.
Have you thought about investing in a business? Your financial adviser should have a plethora of options seeking investment by high net worth individuals; he/she should be able to sift through the incoming prospectuses and make a recommendation as to which ones are credible and worth of consideration.