So sorry about you losing your old Lab

My favorite large, mastiff breed is probably the Leonberger. Also really like the look of Tibetan Mastiffs, finally got to meet some in-person earlier this year Let's see....Shiloh Shepherds are nice dogs; Saint Bernards come in either short or long-haired varities; and well-bred, well-socialized Rottweilers & American Bulldogs are very nice dogs! Great Pyrenees are also sweet dogs, but be prepared for *massive* shedding! There are so many great, giant breeds that it's really a lot up to your own preferences....

A word of warning in case you aren't aware, many giant breeds have very short lifespans (8 years average). Commonly short-lived large breeds include: Irish Wolfhound, Bernese Mountain Dog, and Greater Swiss Mountain Dog.

Let us know what kind of dog you get, how exciting!!