Mike Yingling copper (absolutely love this call on wet days)
Lights Out: Ceramic, Slate, and Glass.
These calls are great sounding when coupled with a large variety of strikers. How or which ones get played, all depends on how I feel the birds are liking or how the weather is behaving. I will say that if I had to pick only two, it would be my slate and then my glass (dry days) or my ceramic and copper (wet/damp mornings).