I have a pile of promo 12 inch singles to do needle drops with. I have not heard them yet, but while cleaning them I was amazed at the space some of the songs took up on the record surface. Tom Petty's Don't Come Around Here No More promo 12" single uses as much surface area as most complete albums! I assume this will lead to better sound quality as the grooves may be further apart? I was wondering what other 12 inch singles (promo or stock) are known for excellent sound quality. Anyone have any suggestions?