Wow, surprised nobody has mentioned Jammin Sams yet. He offers a VERY GOOD deal on heads - very simple basic, quite similar to clear ambassadors, but I also think he offers coated now? I know they work very well as resos but not sure how well they work as batters. I have a set of them for a restore project that I have not gotten to yet. I will post when I get around to it and try them out.
Definitely worth looking into.
John