I am thinking of buying a small roaster - the Ambex YM2 ( I think), or the Diedrich IR3. If I remember correctly, the Ambex is quite a bit cheaper than the Diedrich. Actually, a guy I know wants to sell me a used Diedrich, but I believe his used price is still more than a new Ambex. Any thoughts? Also, anyone who has attended the Ambex training...did you find it worthwhile? Thanks.