When I lived in Washington, I always thought about keeping perch in an aquarium. We used to catch perch and crappie from the same area. I think they would be quite complimentary. Haven't seen too much documentation from people who have done this, but I think it would be cool.
A smallmouth bass would be cool, too, but it would certainly outgrow the 55.
A smallmouth bass would be cool, too, but it would certainly outgrow the 55.