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More money towards down payment versus long-term investments
I'd put the 20% down, close on the house, live in it for a year, and save the difference.  If you find your cash flow is fine, run a calculation and start on a program of prepaying a bit of principal each month as an extra payment. If you study how amortization works, you'll understand that an extra payment of about 1/6 the amount due will knock off a full payment at the end. This is how a 30 year mortgage starts out. Meanwhile, you should keep in mind, it's easy to prepay the mortgage, but there's really no getting it back. So, before letting go of your money, I'd do a few things; I may be stating the obvious, but consider - No matter how low the payment on your mortgage, a payment is due each and every month until it's paid off. You put 80% down, take a 10 year mortgage, you still have payments for 10 years. You want to insure yourself against needing to sell in a hurry if you both lose your jobs, so whatever you put down, I'd recommend a healthy emergency account, 9-12 months worth of expenses.