I have been doing a lot of research on this site but I cant seem to get enough info to pull the trigger. Anyways, As far as background, I'm mostly into jazz but I enjoy hip-hop and rock as well. I'm looking for some un-amped phones that are open and are under around $250. So far, I have looked into Sennheiser HD's(not sure if they work with no amp) or Grado SR225i. If anyone has any suggestions, that would be great appreciated, thank you very much.