30" /10# is decent
35ish /20# is the Big trophy (perhaps a once in a life fish, unless you know what your doing)
a 23-25" cat (5#), while a pretty nice fight is a pretty ordinary-sized cat.
so, I don't know. while Big waterways hold more big cats, I imagine that there are lots of places (including pymy) that hold the occasional 20# cat. I've personally seen cats that approach this size on an ordinary night out of Erie.