What do you think about the UM merlins? I'm very tempted to get some...
I love them. Once I got them I sold my all my other IEMs and most of my portable headphones (except the ES10 and HD25).
I'd say it depends on what sort of sound signature you like though. As you'll notice from my collection I like a "fun" signature with plentiful sub-bass as opposed to sterile, clinical neutrality.
I like a bit of D&B, electronic, hip-hop and rock/indie. It is great for those genres.