to Hamberg...to find these 'diamonds in the rough' you have to search a little.Good music will not always just fall on your lap through word of mouth,T.V,or the radio.Go to metal
www.metal-observer.com to look through the enormous amount of bands you may or may not have heard of.Read some reviews,check a sound byte if available and do more searching.
It apply's to any genre really.There are tons of great bands(often in a sea of crap)to find for whatever music you like.
Try once,fail twice...