Based on your liking the Quad and finding your Klipsh to not be the right signature or lacking I think the Etymotic's will similarly be lacking. Brainwavz is currently coming out with a Quad BA driver IEM that early impressions suggest might have a more bass oriented signature you might like. Pioneer CH9T might also fit the bill. Or you might want to consider the Fiio F9. Finally there is the original audiophile based bass oriented IEM Sennheiser IE80 or the IE80S which is just about to ne released.