I have narrowed down my search for new headphones to some Ultrasones and Grados. I have a $200 budget and I know that some of these go over but I have been able to find them for cheaper prices. These are the headphones I am thinking about: Ultrasone Pro 2500 and HFI-780 or 580. I also am thinking about Grado SR80i. I don't need to much bass but I would like it to have a little bit of a punch. One of my top priorities is the treble. I want really clear high but I don't want to sacrifice the bass or vocals entirely. I don't have an amp but please tell me if you think it is necessary to have one. Open or closed doesn't matter to me. I understand that the Grados leak a lot of sound but I'm okay with that. I 80% of my music is classic rock with some Alternative mixed in. So, I want a headphone that works well with classic rock mainly. I want to take into account the comfort also. I want my headphones to be comfortable but the overall sound quality is more important than comfort. Thank you for the advice.