I've caught several smallmouth in the 5 lb class.  A lot of them on Dale Hollow.  21 inches is the size limit, so I've not weighed many of them.  I have caught a few in the low 6's.
As far as Largemouth go, my best was caught on a private lake in Alabama, it weighed around 10, and was released.  Over time, I have caught several in the 7 pound category and a couple just over 8.  16 lbs is outstanding.  I've only seen 1 bigger, and that was Woody's bass.
Skipper