Clueless731

New user here. Need advice on a combo Dac/Headphone amp. Just recently purchased a new set of V-Moda Crossfade M-100's. Wanted to use it with my 120gb iPod classic. Was looking at several choices such as the Fostex, ADX, and Fiio. I also see that the prices vary greatly.Since the headphones are not High end audiophile headphones, I'm wondering which one would give me the best quality sound. Thanks for the help