I think he's looking for something under the 150$ range the lowest iv seen the amperiors were 250$ used.
The only headphone I remember with a fast aggresive sound was the sol republic tracks hd's( I'm thinking of getting a pair myself for school) I should point out that the tracks ultras have more detail but less bass so that might be something your looking for. If all else fails you can't go wrong with the ath m50s or one of the ultrasone hifi models
Check out the "Deals" thread. I just saw refurbished Amperors for $167.00. Forget the $349, and even the $250 (used) price. The refurbished gear from Sennheiser is top-notch.
Edit: Here is a link to the headphones for $167.00 - with free shipping. http://www.vminnovations.com/Product_46888/Sennheiser-HD-25-Amperior-DJ-Pro-Monitoring-Headphones-Blue-Refurbished-.html
Edited by wje - 1/21/13 at 6:23am