Very sorry to hear that you lost your family friend Steve, we lost our St. Bernard in similar circumstances about a year ago and it's a tough one to get over.
I just wanted to mention something that I don't believe anyone else has mentioned... maybe taking some time to grieve before getting a new dog. Sometimes we are so lost without that familiar face, that we can make some hasty decisions. A new pup with be just as cute and lovable a month from now. Just a thought.