Recommend good (cheap) teapot?
 

It you want a teapot for looks, then go with the cast iron. But don't
expect to get good results with the teas you brew in them. I always
find the metal of the pot interferes with the true flavor of the tea.

If you're into trying new, moderate priced expensive teas (whole leaf,
not bag), then go with the chatsford teapot. It won't interfere much
with the taste of the tea; meaning you can enjoy your teas better, and
appreciate the flavor and aroma better.