bassfreak

hi i need some advice,i was using the ep 630 and the bass is good then i swtched to the creative aurvana thinking the bass will be better but the bass was weak but the clarity is much better though..i tried the es 7 and i didnt know that headphones sounded good even on an ipod..i new so i dunt know if i should a better iem or the es 7.. any recommendations besides es 7 of the same price range? thanks!