You run w/ a ipod=>hp-p1=>Merlin?!
Basically, to bridge the gap. There's some music that I listen to on the train on the way to work. Or when I'm out on a walk/run. That I'm not really doing any 'critical' listening, and I just want that real bass slam to give me the energy to keep running or brighten my day a little. But I don't want that all the time. In fact I will probably only want it in those 2 situations. And given the choice of waiting for something like the JH3A which has adjustable bass (which I am still considering), or having a iPod Classic > HP-P1 with both the Miracle and Merlin. I've got everything I could ask for really. So to me the decision was a no brainer. If what I've heard and read is to be believed. These will be great for that application. All the highs and mids of the Miracle with a little more kick, even if it does lose a little control. I think the 'fun' of it will be my main focus.
Also, and this is more of a stupid thing, but I had an awesome idea for artwork on them, and just couldn't resist putting it on something.