To put it simply (on my phone) I have narrowed it down to 3 choices. All the choices will come to 160 (my max budget). They are Etymotic hf5 with fiio e11, hifiman re400 with e11, and the tdk ba200, no amp. I listen to mostly rock and country on the go. For the amp on the go (i have the amp) but will need to buy an adapter for my new iPod, so they all come to $160.