That's wonderful because my real estate broker just recommended me to get pre-approved from somebody he recommends at JPM. You saying I should just research to find a real bank with a low rate?
Unless you're buying a new home with an in house lender, I've found it's always best to go with the big banks. If you're buying new build, then the incentives the builders gives for using inhouse will usually blow away anything that a big bank can offer. (At least in my experience)