I lived in downtown Lansing for almost 6 years, I only made it to Preuss's
A half dozen times, but loved it every time I went.
Shelob was amazing to watch, She was a giant Tarantula.
The Preuss breeding setup is on site if I remember correctly, which is more than impressive. Especially seeing as how everyone imports stuff cross country near me.
I've heard great things about the Fish doctors in I think Livonia, and Ypsilanti.
And Fantastic Fins in Detroit is also Highly recommended.