What you should do is generate the info off the calculators for different scenarios, and have your computer with this page open when talking to a mortgage broker...this way you can generate different scenarios depending on the interest rates, points, etc. they are quoting you.
Base your decisions on a fixed interest rate of 30 yr basis. Have this common denominator of numbers printed out. Then go from there. Remember to include your monthly costs of taxes and insurance, HOA, (home owners association) fees, etc. also!
The answer depends on lot of things eg- mortgage program there are about 400 different kind, your credit score( what interest rate you qualify for), downpayment etc. Most mortgage broker will let you know for free. But lets say you are putting 20% down and getting 6% 30 yrs fixed you will be paying about 2000 mortgage plus interest.
This is very rough. You can actually visit http://www.essexhomesnj.com and click on calculator to know it yourself.