Songs that showcase Opeths talent

blackwater park (the song off the album titled blackwater park)
harvest...
reverie/harlequin forest...

all 3 of these songs that i made my freinds listen ( the ones who dont like rap... which sadly isint many :(... after they listen to them they freaked ran to HMV and got every album in the store
 
April Ethereal, The Moor, & The Drapery Falls.
But here's a better option tell him to buy one of their albums & see what happens.