Best Headphones for Coldplay and U2 (Alternative,Rock) 300-400 Max

Hi guys im new to this and im wondering what on/over ear headphones you can recomend. As said in the title i listen to alot of coldplay and U2 (min 3 hrs a day). Ive looked at a few phones and i have sort of a list in no particulat order : (1) AKG K701, (2) Grado sr325is (i liked it more than the 225i), (3) the Denon d2000, (4) Dt880, and (5) shure srh 940. I was able to try out the grados and denons. I have a thing for slightly bright and up front headphones whitch is probably why i dont particularley like the B&W P5. i liked the 325is because they were energetic but i liked the richness of the denons, though when listening to the denons there were occasionaly a few notes in the midbass area that were so powerfull after a few hits i took them off whith sore ears and a headache . Could it have been the source or amp? Oh and finaly will the headphones all need an amp, any recomendations for a cheap one. i have a big yamaha analog amp (AX-500U) that puts out enough voltage and enough current to power probably almost anything bt i would assume it is sub-par in the sound department. Do you guys have any other recomendations for headphones besides my list thanks! .

thanks will do

Awsome ive been looking at thr e9 and 10 im probaly gonna do a little reaserch and if there the right thing pick them up. oh awsome i can get these cans within 4 blocks of my house. do you know the differences between the 990 and the 770 besides being open and closed

switched to http://www.head-fi.org/f/4/headphones-full-size