I got new tires for the SAAB. They're P205/60R-16 91T. The Hankook Optimo H727 were highly rated by Consumer Reports. They're narrower than stock (205 v 215) and not as high performance as my previous tire choices. I felt I've got to a point in my life when I'm never going to need tires rated to speeds of 149mph ever again. I instead looked for comfort, quietness and an all-season that handles snow/ice okay.
Here are the various tire sizes (from narrow to wide) that fit a stock 2000 SAAB 9-5 with 16" wheels: