It all depends on what other expenses you have, and how much money you need to live on, like how much you spend on clothing a week, and food, gas, etc.. Also do you have an expensive car, or cheaper car. It really varies. 60k a year after taxes is roughly 5k a month, so a house payment of 2k or less should still leave you enough money for other expenses, unless like I said, you go out to eat a lot, or have to have an expensive car, etc... Also the less your house cost, it leaves you more money to travel and other fun things.
Some people can easily live off 30k a year, where as some people need over 100k a year to be satisfied. I really can't give you a direct answer.
EDIT: Dude calm down. It's 40% DEDUCTION, meaning 60k taken from the 150k, leaving you 90k after taxes, not 60k. bw022 is right. Simple math. If you have 60k after takes, that would be over half your check taken out from taxes. More than 40%. Do you understand that?