In glass over slate, I'd go with Jimmy Schaffer...Aluminum over glass, Glen Marrer (Fingerlakes calls) makes a really nice pau rosa if he has any left. If not he'll have a suggestion for ya'...Aluminum over aluminum, again, Jimmy Schaffer. I like his ash pot...Copper, no question, Scott Vieting (Bearded Hen Turkey Calls). Nice guy and makes a copper those gobblers can't resist...And, not to forget, Lonnie Sneed outlaw hen (green glass)...There are lots more but these would be my first choices...