Looking for a Dog companion...?

I would like a medium sized dog, just nothing tiny or really large. I would also like it to be pretty active but not overly active like a dalmation for example. I have done tons of research but i can't pin point on a specific breed. I was thinking of a Vizsla so anything alternatives that have less energy would be nice. Please brainstorm a couple possible breeds because i would like to be dead set on a particular breed before i actually look for one.