Should I pay points to lower my interest rate?

Yes, if you plan to stay in the property for a least a few years. Paying discount points to lower the loan's interest rate is a good way to lower your required monthly loan payment, and possibly increase the loan amount that you can afford to borrow. However, if you plan to stay in the property for only a year or two, your monthly savings may not be enough to recoup the cost of the discount points that you paid up-front.