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60% Downpayment on house?
To answer your precise question, your plans are not at all misguided, and are in fact very reasonable. You are clearly financially very comfortable, and from the tone of your post it sounds like you value security and simplicity over maximizing your investment return over the coming years.  If money was the most important thing to you then you would stay shackled to your high paying jobs. @JoeTaxpayer's answer has some great information for a person who is interested in maximizing their investment return.  If you followed that advice, you might increase your return on investments by up to 1%/year (I'm just throwing a ball park number out there). So your choice is simple.  Peace of mind on one hand and perhaps 1% additional return on investments on the other hand.