Yeah, honestly speaking, even after a song's been fine-tuned and mastered, some speakers/headphones will accent things more than others, so it really can't be said that lack of equalizer is listening to songs as the artist intended. There are ones out there specifically targeted towards those who don't know much about headphones that are stupid overpriced - they typically have accented bass, and some of it's freaking ridiculous. Not saying that all bass-heavy headphones are bad, it's just one of the first things that people notice so some companies bloat it and it stands out, then they market it like it's the best thing ever, but it's not even good bass.
However, if cold and analytical is your style, I hear the Head Direct/HiFiMan RE-0's don't do much to color sound as it comes out (meaning that you do, in fact, hear things about exactly as mastered), though I hear lately they've been having breakage problems. Etymotic Research had an offering similar to that, and I don't think has the same problems from what I've heard... I think they were the ER-4P's.
EDIT: Messed up a company name. Geez...