Due to responses to the thread http://www.head-fi.org/t/583794/good-semi-past-entry-level-headphones I have decided to choose upon the above two headphones because they are either semi or full open air. What are the differences of the two? And perhaps, which would you recommend me?

After two and a half years of use, my Audio-Technica ATH-E37 http://www.amazon.com/gp/product/B00164F1EY/ref=oh_o01_s00_i00_details   died on me (the left side's wiring got screwed up I'm guessing). Hence, I'm looking for some new cans, and was thinking of upgrading to full-sized ones. I...

Okay. So I have decided on the following. iPod touch 64 GB Head-direct RE0 So, I have to decide on the amp. Would driving the RE0 with the Nuforce mobile icon be much different from driving the RE0 with the Fiio E5? In other words, is the price difference of 75 dollars worth it?

What's a good earphone that can be driven by this amp? The source is iPod touch 64 GB. My budget is around 130 =P (kinda low I know). Amazon is having a large discount on a lot of headphones, although I don't know if they are good or not. And how about the same thing for a Fiio E5? I was...

Source: iPod 64 GB If I'm going to amp it up with a Fiio E5, which would sound better? The Cresyn 750E or the Klipsch Image S4? Also, if I were to upgrade to a Nuforce Icon Mobile later, which would be better?

I'm a semi-audiophile, and I was thinking of this combination: iPod touch 32 GB or 64 GB (the newest generation) Altec Lansing UHP326 Backbeat Series (I have an audiotechnica ATH-ES7, but I don't really want to carry it to school, and risk breaking it). And a Fiio E5 amp (or Fio E3, is...