How can I find the best Mortgage Rate on a 30 year fixed loan? Lender could be out of state for MA.?

I live in MA but want to find the best mortgage rate on a 30 year fixed mortgage, We have ability to put 25-30% down, maybe more. Rates were showing at 5.3% last week. They went up. Can I use an out of state lender to finance in MA? http://bit.ly/jYtDGK