I am thinking of selling my Shure SE215 and HD650's and getting one really good pair of IEM's.... So this would give me a max budget of £250 which I assume should get me a very nice pair of IEM's.... I have been reading about it and it seems that BA drivers will never have as much bass response as dynamic drivers, So it seems that high end dynamics are the way to go for me..... I am looking for the best bass possible, I dont mean boomy mid bass, I mean powerfull, punchy, textured, fast sub bass down to 10hz. I am also looking for all the other aspects to be good such as soundstage, imaging, smooth/warm midrange and smooth treble. It is no use having good bass if they have harsh, bright treble because I cannot stand this. So far the only pair which look good to me are the Sennheiser IE80's although I am not sure how good the bass on these is. Any suggestions?