I have not heard the FA-003's, but I own the 011s and really like them. Just to pile on what was said above, the FA-011s definitely have a V shaped profile. The bass and treble are very present, but I do not think they overpower the mids, which I really dig. Also, they have a really nice, wide soundstage (google and listen to the virtual barber shop, it is incredible with these headphones). The fact that they accomplish this and are still clear and detailed (to my ears at least) is a win for me. All in all, thse qualities make them very fun sounding and enjoyable to listen to. Another thing, I have found that garbage in = garbage out with these. Low quality recordings seem to bring out some harshness in the highs, so if you have a lot of lossless music, I think that will really pay dividends to you.